187 行
11 KiB
JSON
187 行
11 KiB
JSON
{
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"canonical_id": "astro--CVE-2025-65019",
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"system_id": "astro",
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"display_name": "Astro",
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"category": "frameworks",
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"advisory_mode": "core",
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"title": "Astro Cloudflare adapter has Stored Cross-site Scripting vulnerability in /_image endpoint",
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"summary": "**Summary** \nA Cross-Site Scripting (XSS) vulnerability exists in Astro when using the **@astrojs/cloudflare** adapter with `output: 'server'`. The built-in image optimization endpoint (`/_image`) uses `isRemoteAllowed()` from Astro\u2019s internal helpers, which **unconditionally allows `data:` URLs**. When the endpoint receives a valid `data:` URL pointing to a malicious SVG containing JavaScript, and the Cloudflare-specific implementation performs a **302 redirect back to the original `data:` URL**, the browser directly executes the embedded JavaScript. This completely bypasses any domain allow-listing (`image.domains` / `image.remotePatterns`) and typical Content Security Policy mitigations.\n\n**Affected Versions** \n- `@astrojs/cloudflare` \u2264 12.6.10 (and likely all previous versions) \n- Astro \u2265 4.x when used with `output: 'server'` and the Cloudflare adapter\n\n**Root Cause \u2013 Vulnerable Code** \nFile: `node_modules/@astrojs/internal-helpers/src/remote.ts`\n\n```ts\nexport function isRemoteAllowed(src: string, ...): boolean {\n if (!URL.canParse(src)) {\n return false;\n }\n const url = new URL(src);\n\n // Data URLs are always allowed \n if (url.protocol === 'data:') {\n return true;\n }\n\n // Non-http(s) protocols are never allowed\n if (!['http:', 'https:'].includes(url.protocol)) {\n return false;\n }\n // ... further http/https allow-list checks\n}\n```\n\nIn the **Cloudflare adapter**, the `/_image` endpoint contains logic similar to:\n\n```ts\n\tconst href = ctx.url.searchParams.get('href');\n\tif (!href) {\n\t\t// return error \n\t}\n\n\tif (isRemotePath(href)) {\n\t\tif (isRemoteAllowed(href, imageConfig) === false) {\n\t\t\t// return error\n\t\t} else {\n //redirect to return the image \n\t\t\treturn Response.redirect(href, 302);\n\t\t}\n\t}\n```\n\nBecause `data:` URLs are considered \u201callowed\u201d, a request such as: \n`https://example.com/_image?href=data:image/svg+xml;base64,PHN2Zy... (base64-encoded malicious SVG)` \n\ntriggers a **302 redirect directly to the `data:` URL**, causing the browser to render and execute the malicious JavaScript inside the SVG.\n\n**Proof of Concept (PoC)** \n\n1. Create a minimal Astro project with Cloudflare adapter (`output: 'server'`).\n2. Deploy to Cloudflare Pages or Workers.\n3. Request the image endpoint with the following payload:\n\n```\nhttps://yoursite.com/_image?href=data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjxzY3JpcHQ+YWxlcnQoJ3pvbWFzZWMnKTwvc2NyaXB0Pjwvc3ZnPg==\n```\n\n (Base64 decodes to: `<svg xmlns=\"http://www.w3.org/2000/svg\"><script>alert('zomasec')</script></svg>`)\n\n4. The endpoint returns a **302 redirect** to the `data:` URL \u2192 browser executes the `<script>` \u2192 `alert()` fires.\n\n**Impact** \n- Reflected/Strored XSS (depending on application usage) \n- Session hijacking (access to cookies, localStorage, etc.) \n- Account takeover when combined with CSRF \n- Data exfiltration to attacker-controlled servers \n- Bypasses `image.domains` / `image.remotePatterns` configuration entirely \n\n**Safe vs Vulnerable Behavior** \nOther Astro adapters (Node, Vercel, etc.) typically **proxy and rasterize** SVGs, stripping JavaScript. The **Cloudflare adapter** currently **redirects** to remote resources (including `data:` URLs), making it uniquely vulnerable.\n\n**References** \n- Vulnerable function: https://github.com/withastro/astro/blob/main/packages/internal-helpers/src/remote.ts \n- Similar `data:` URL bypass in WordPress: [CVE-2025-2575 ](https://feedly.com/cve/CVE-2025-2575)",
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"published_at": "2025-11-19T20:09:12Z",
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"updated_at": "2025-11-27T08:33:26.119485Z",
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"severity": "low",
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"cvss_score": 3.1,
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"exploit_status": "unknown",
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"source_confidence": "official",
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"official_source_url": "https://github.com/withastro/astro/security/advisories/GHSA-fvmw-cj7j-j39q",
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"secondary_source_urls": [
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"https://nvd.nist.gov/vuln/detail/CVE-2025-65019",
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"https://github.com/withastro/astro/commit/9e9c528191b6f5e06db9daf6ad26b8f68016e533",
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"https://github.com/withastro/astro"
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],
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"aliases": [
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"CVE-2025-65019",
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"GHSA-fvmw-cj7j-j39q"
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],
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"cve_ids": [
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"CVE-2025-65019"
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],
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"ghsa_ids": [
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"GHSA-fvmw-cj7j-j39q"
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],
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"osv_ids": [
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"GHSA-fvmw-cj7j-j39q"
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],
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"affected_versions": [
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"introduced=0, fixed<5.15.9"
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],
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"fixed_versions": [
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"5.15.9"
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],
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"package_name": "astro",
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"render_markdown": true,
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"case_path": "07-framework-security/frameworks/astro/cases/astro-cve-2025-65019.md",
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"secure_code_topics": [
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"authz-server-side-recheck",
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"csp-trusted-types",
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"xss-output-encoding",
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"token-cookie-storage",
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"plugin-extension-trust-policy",
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"dependency-upgrade-policy",
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"proxy-trust-boundary"
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],
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"status": "generated",
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"triage_reasons": [],
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"entity_refs": [
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{
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"entity_id": "astro",
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"entity_type": "system",
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"relation": "root-system",
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"root_system_id": "astro",
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"official": true
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},
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{
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"entity_id": "astro--project--astro",
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"entity_type": "project",
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"relation": "affected-component",
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"root_system_id": "astro",
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"official": false
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}
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],
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"affected_components": [
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{
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"name": "astro",
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"entity_id": "astro--project--astro",
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"scope": "package",
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"package_name": "astro",
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"official": false
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}
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],
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"affected_version_ranges": [
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"introduced=0, fixed<5.15.9"
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],
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"fixed_version_ranges": [
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"5.15.9"
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],
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"introduced_version": "introduced=0, fixed<5.15.9",
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"patched_version": "5.15.9",
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"version_evidence_sources": [
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"https://github.com/withastro/astro/security/advisories/GHSA-fvmw-cj7j-j39q",
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"https://nvd.nist.gov/vuln/detail/CVE-2025-65019",
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"https://github.com/withastro/astro/commit/9e9c528191b6f5e06db9daf6ad26b8f68016e533",
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"https://github.com/withastro/astro"
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],
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"affected_version_refs": [
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"astro--project--astro--introduced-0-fixed-5-15-9"
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],
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"fixed_version_refs": [
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"astro--project--astro--5-15-9"
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],
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"patched_version_refs": [
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"astro--project--astro--5-15-9"
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],
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"version_sync_confidence": "high",
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"advisory_scope": "package",
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"version_confidence": "high",
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"version_gap_reason": "",
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"version_resolution_needed": false,
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"workflow": {
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"workflow_id": "astro--CVE-2025-65019--workflow",
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"vuln_family": "xss",
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"entry_surface": "web-ui-render-path",
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"preconditions": [
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"\u4ec5\u5728 lab-local\u3001lab-public \u6216\u660e\u786e\u6388\u6743\u76ee\u6807\u4e2d\u6267\u884c\u3002",
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"\u786e\u8ba4\u76ee\u6807\u547d\u4e2d\u7248\u672c\u65ad\u8a00: introduced=0, fixed<5.15.9",
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"\u82e5\u5bf9\u8c61\u5c5e\u4e8e `package`\uff0c\u5148\u786e\u8ba4\u6269\u5c55/\u4ed3\u5e93/\u5305\u5df2\u542f\u7528\u5e76\u5904\u4e8e\u53d7\u5f71\u54cd\u7248\u672c\u3002"
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],
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"required_role": "editor-or-admin",
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"affected_version_assertion": [
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"introduced=0, fixed<5.15.9"
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],
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"trigger_vector": "\u5bf9 `xss` \u5bb6\u65cf\u5165\u53e3\u6295\u9012\u6700\u5c0f\u5316\u3001\u53ef\u5ba1\u8ba1\u3001\u53ef\u56de\u6eda\u7684\u53d7\u63a7\u8f93\u5165\uff0c\u6bd4\u8f83\u4fee\u590d\u524d\u540e\u5dee\u5f02\u3002",
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"request_or_ui_path": [
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"/admin/editor",
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"/preview",
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"/rendered-content"
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],
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"input_shape": "\u53d7\u63a7 HTML/Markdown/\u5bcc\u6587\u672c\u8f93\u5165\uff0c\u89c2\u5bdf\u6e32\u67d3\u4e0a\u4e0b\u6587\u662f\u5426\u5931\u53bb\u7f16\u7801\u6216\u51c0\u5316\u3002",
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"expected_unsafe_behavior": "\u8f93\u5165\u5728\u76ee\u6807\u4e0a\u4e0b\u6587\u6267\u884c\u6216\u88ab\u6d4f\u89c8\u5668\u89e3\u91ca\u4e3a\u4e3b\u52a8\u5185\u5bb9\u3002",
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"server_evidence_points": [
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"\u5e94\u7528\u65e5\u5fd7\u4e2d\u7684\u547d\u4e2d\u8def\u5f84\u3001\u9274\u6743\u51b3\u7b56\u548c\u5f02\u5e38\u6808",
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"\u53cd\u5411\u4ee3\u7406\u6216\u8fb9\u754c\u5c42\u65e5\u5fd7\u4e2d\u7684\u8bf7\u6c42\u5934\u3001\u6765\u6e90 IP \u4e0e\u8def\u7531\u51b3\u7b56"
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],
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"browser_evidence_points": [
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"\u57fa\u7ebf\u622a\u56fe\u4e0e\u653b\u51fb\u540e\u622a\u56fe\u7684 DOM/\u89c6\u89c9\u5dee\u5f02",
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"console\u3001network \u4e0e response metadata \u4e2d\u7684\u5f02\u5e38\u4fe1\u53f7"
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],
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"db_or_fs_evidence_points": [
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"\u6570\u636e\u5e93\u4e2d\u65b0\u589e/\u8d8a\u6743\u8bfb\u53d6\u7684\u6d4b\u8bd5\u6570\u636e",
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"\u6587\u4ef6\u7cfb\u7edf\u4e2d\u65b0\u589e\u4e0a\u4f20\u6837\u672c\u3001\u7f13\u5b58\u6761\u76ee\u6216\u8d8a\u6743\u8bfb\u53d6\u75d5\u8ff9"
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],
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"detection_signals": [
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"WAF / reverse proxy \u5f02\u5e38\u65e5\u5fd7\u3001\u8bbf\u95ee\u65e5\u5fd7\u548c\u544a\u8b66",
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"\u5e94\u7528\u5ba1\u8ba1\u65e5\u5fd7\u4e2d\u7684\u6743\u9650\u9519\u8bef\u3001\u91cd\u5b9a\u5411\u5f02\u5e38\u3001\u6a21\u677f\u6e32\u67d3\u6216\u4e0a\u4f20\u843d\u76d8\u4e8b\u4ef6"
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],
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"mitigation_summary": "\u4f18\u5148\u5347\u7ea7\u5230\u4fee\u590d\u7248\u672c\uff0c\u5e76\u540c\u65f6\u6536\u7d27\u8f93\u5165\u6821\u9a8c\u3001\u670d\u52a1\u7aef\u9274\u6743\u3001\u4ee3\u7406\u4fe1\u4efb\u8fb9\u754c\u3001\u6269\u5c55\u5b89\u88c5\u4fe1\u4efb\u548c\u5ba1\u8ba1\u65e5\u5fd7\u3002",
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"patch_validation_steps": [
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"\u786e\u8ba4\u76ee\u6807\u7248\u672c\u4ece `introduced=0, fixed<5.15.9` \u5347\u7ea7\u6216\u56de\u79fb\u5230 `5.15.9`\u3002",
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"\u4fdd\u7559\u540c\u4e00\u7ec4\u53d7\u63a7\u8f93\u5165\uff0c\u5728\u4fee\u590d\u524d\u540e\u5206\u522b\u6267\u884c\u5e76\u6bd4\u5bf9\u54cd\u5e94\u3001\u65e5\u5fd7\u4e0e\u6d4f\u89c8\u5668\u8bc1\u636e\u3002",
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"\u786e\u8ba4\u4fee\u590d\u540e\u4ec5\u4fdd\u7559\u9884\u671f\u4e1a\u52a1\u884c\u4e3a\uff0c\u4e0d\u518d\u89e6\u53d1\u8d8a\u6743\u3001\u56de\u663e\u3001\u5f02\u5e38\u6e32\u67d3\u6216\u9519\u8bef\u8bf7\u6c42\u3002",
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"\u8865\u5145 `xss` \u65cf\u81ea\u52a8\u5316\u56de\u5f52\uff0c\u907f\u514d\u540c\u7c7b\u8def\u5f84\u5728\u63d2\u4ef6\u3001\u4e3b\u9898\u6216\u4ee3\u7406\u94fe\u4e2d\u56de\u5f52\u3002"
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],
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"lab_safety_notes": [
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"\u53ea\u4f7f\u7528\u56de\u73af\u5730\u5740\u3001\u54e8\u5175\u76ee\u6807\u3001\u65e0\u5bb3\u6837\u672c\u6216\u53ef\u56de\u6eda\u6d4b\u8bd5\u6570\u636e\u3002",
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"\u7981\u6b62\u9020\u6210\u6301\u4e45\u7834\u574f\u3001\u8d8a\u6743\u4e0b\u8f7d\u771f\u5b9e\u6570\u636e\u6216\u4e0d\u53ef\u56de\u6eda side effect\u3002",
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"\u5982\u9700\u6d4f\u89c8\u5668\u8bc1\u636e\uff0c\u4fdd\u7559 baseline / proof \u4e24\u4efd\u5feb\u7167\u4ee5\u53ca console / network \u8bb0\u5f55\u3002"
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],
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"review_state": "ready"
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},
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"verification_status": "triage-manual",
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"verification_mode": "synthetic",
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"last_verified_at": null,
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"last_run_id": null,
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"evidence_bundle": null,
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"historical_status": null,
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"latest_status": null,
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"browser_evidence": {
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"required": false,
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"present": false,
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"refs": []
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},
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"repro_profile_id": "xss-generic",
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"artifact_mode": "synthetic",
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"blocked_reason": null,
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"metadata": {
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"source_names": [
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"OSV Astro"
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],
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"source_kinds": [
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"osv-batch"
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],
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"candidate_count": 1,
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"entity_ref_count": 2,
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"advisory_scope": "package",
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"version_confidence": "high",
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"workflow_id": "astro--CVE-2025-65019--workflow"
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}
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}
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