79 行
3.9 KiB
JSON
79 行
3.9 KiB
JSON
{
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"canonical_id": "astro--CVE-2025-55303",
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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 allows unauthorized third-party images in _image endpoint",
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"summary": "### Summary\n\nIn affected versions of `astro`, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served.\n\n### Details\n\nOn-demand rendered sites built with Astro include an `/_image` endpoint which returns optimized versions of images.\n\nThe `/_image` endpoint is restricted to processing local images bundled with the site and also supports remote images from domains the site developer has manually authorized (using the [`image.domains`](https://docs.astro.build/en/reference/configuration-reference/#imagedomains) or [`image.remotePatterns`](https://docs.astro.build/en/reference/configuration-reference/#imageremotepatterns) options).\n\nHowever, a bug in impacted versions of `astro` allows an attacker to bypass the third-party domain restrictions by using a protocol-relative URL as the image source, e.g. `/_image?href=//example.com/image.png`.\n\n### Proof of Concept\n\n1. Create a new minimal Astro project (`astro@5.13.0`).\n\n2. Configure it to use the Node adapter (`@astrojs/node@9.1.0` \u2014 newer versions are not impacted):\n\n ```js\n // astro.config.mjs\n import { defineConfig } from 'astro/config';\n import node from '@astrojs/node';\n\n export default defineConfig({\n \tadapter: node({ mode: 'standalone' }),\n });\n ```\n\n3. Build the site by running `astro build`.\n\n4. Run the server, e.g. with `astro preview`.\n\n5. Append `/_image?href=//placehold.co/600x400` to the preview URL, e.g. <http://localhost:4321/_image?href=//placehold.co/600x400>\n\n6. The site will serve the image from the unauthorized `placehold.co` origin.\n\n### Impact\n\nAllows a non-authorized third-party to create URLs on an impacted site\u2019s origin that serve unauthorized image content.\nIn the case of SVG images, this could include the risk of cross-site scripting (XSS) if a user followed a link to a maliciously crafted SVG.",
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"published_at": "2025-08-19T15:40:31Z",
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"updated_at": "2025-11-27T08:22:36.525875Z",
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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-xf8x-j4p2-f749",
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"secondary_source_urls": [
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"https://nvd.nist.gov/vuln/detail/CVE-2025-55303",
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"https://github.com/withastro/astro/commit/4d16de7f95db5d1ec1ce88610d2a95e606e83820",
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"https://github.com/withastro/astro"
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],
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"aliases": [
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"CVE-2025-55303",
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"GHSA-xf8x-j4p2-f749"
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],
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"cve_ids": [
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"CVE-2025-55303"
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],
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"ghsa_ids": [
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"GHSA-xf8x-j4p2-f749"
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],
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"osv_ids": [
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"GHSA-xf8x-j4p2-f749"
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],
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"affected_versions": [
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"introduced=5.0.0-alpha.0, fixed<5.13.2",
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"introduced=0, fixed<9.1.1",
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"introduced=0, fixed<4.16.19"
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],
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"fixed_versions": [
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"5.13.2",
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"9.1.1",
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"4.16.19"
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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-2025-55303.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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],
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"status": "generated",
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"triage_reasons": [],
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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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}
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}
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