---
title: "Astro allows unauthorized third-party images in _image endpoint"
system_id: "astro"
category: "frameworks"
advisory_mode: "core"
published_date: "2025-08-19T15:40:31Z"
updated_date: "2025-11-27T08:22:36.525875Z"
severity: "low"
exploit_status: "unknown"
source_confidence: "official"
verification_status: "triage-manual"
verification_mode: "synthetic"
artifact_mode: "synthetic"
last_run_id: ""
target_types:
  - "lab-local"
  - "lab-public"
  - "authorized-third-party"
allow_public_validation: "yes, with ownership or explicit authorization"
authorization_prerequisite: "asset ownership proof or explicit written authorization"
minimal_validation: "read-only probe, controlled payload, reversible test"
aliases:
  - "CVE-2025-55303"
  - "GHSA-xf8x-j4p2-f749"
affected_versions:
  - "introduced=5.0.0-alpha.0, fixed<5.13.2"
  - "introduced=0, fixed<9.1.1"
  - "introduced=0, fixed<4.16.19"
fixed_versions:
  - "5.13.2"
  - "9.1.1"
  - "4.16.19"
secure_code_topics:
  - "authz-server-side-recheck"
  - "csp-trusted-types"
  - "xss-output-encoding"
primary_source: "https://github.com/withastro/astro/security/advisories/GHSA-xf8x-j4p2-f749"
---

# Astro allows unauthorized third-party images in _image endpoint

## 本地实证状态

- 实证状态: `triage-manual`
- 实证方式: `synthetic`
- Artifact 模式: `synthetic`
- 最近运行: `-`
- 浏览器证据: `missing`
- Run Bundle: `-`

## 事件层

- Canonical ID: `astro--CVE-2025-55303`
- 系统: `astro`
- 严重度: `low`
- 来源置信度: `official`
- 官方主源: https://github.com/withastro/astro/security/advisories/GHSA-xf8x-j4p2-f749
- 影响版本: `introduced=5.0.0-alpha.0, fixed<5.13.2, introduced=0, fixed<9.1.1, introduced=0, fixed<4.16.19`
- 修复版本: `5.13.2, 9.1.1, 4.16.19`

## 其他来源

- https://nvd.nist.gov/vuln/detail/CVE-2025-55303
- https://github.com/withastro/astro/commit/4d16de7f95db5d1ec1ce88610d2a95e606e83820
- https://github.com/withastro/astro

## 实验层

- 仅用于自有资产、测试环境或已明确授权目标。
- 允许公网可达目标，但必须满足资产归属或明确授权前提。
- 最小化验证方式: 最小化验证、只读探测、可审计回显、受控注入。
- 若该案例涉及插件、模块或扩展，应同时检查供应链与升级策略。
- 禁止场景: 无归属证明或无明确授权的公网目标；知名公共网站或与测试无关的第三方资产；会造成持久破坏、数据越权下载或不可回滚影响的动作

## 修复示例

- [javascript-typescript:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/javascript-typescript/authz-server-side-recheck.md)
- [nodejs:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/nodejs/authz-server-side-recheck.md)
- [java:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/java/authz-server-side-recheck.md)
- [php:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/php/authz-server-side-recheck.md)
- [python:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/python/authz-server-side-recheck.md)
- [ruby:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/ruby/authz-server-side-recheck.md)
- [csharp:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/csharp/authz-server-side-recheck.md)
- [go:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/go/authz-server-side-recheck.md)
- [javascript-typescript:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/javascript-typescript/csp-trusted-types.md)
- [nodejs:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/nodejs/csp-trusted-types.md)
- [java:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/java/csp-trusted-types.md)
- [php:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/php/csp-trusted-types.md)
- [python:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/python/csp-trusted-types.md)
- [ruby:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/ruby/csp-trusted-types.md)
- [csharp:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/csharp/csp-trusted-types.md)
- [go:csp-trusted-types](/Users/x/websafe/05-defense/secure-code/go/csp-trusted-types.md)
- [javascript-typescript:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/javascript-typescript/xss-output-encoding.md)
- [nodejs:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/nodejs/xss-output-encoding.md)
- [java:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/java/xss-output-encoding.md)
- [php:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/php/xss-output-encoding.md)
- [python:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/python/xss-output-encoding.md)
- [ruby:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/ruby/xss-output-encoding.md)
- [csharp:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/csharp/xss-output-encoding.md)
- [go:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/go/xss-output-encoding.md)