websafe-kb/07-framework-security/frameworks/astro/cases/astro-cve-2025-66202.md

---
title: "Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765"
system_id: "astro"
category: "frameworks"
advisory_mode: "core"
published_date: "2025-12-08T16:26:43Z"
updated_date: "2026-02-04T02:27:12.689316Z"
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-2025-66202"
  - "GHSA-whqg-ppgf-wp8c"
affected_versions:
  - "introduced=0, fixed<5.15.8"
fixed_versions:
  - "5.15.8"
entity_refs:
  - "astro:system:root-system"
  - "astro--project--astro:project:affected-component"
secure_code_topics:
  - "authz-server-side-recheck"
  - "csp-trusted-types"
  - "proxy-trust-boundary"
primary_source: "https://github.com/withastro/astro/security/advisories/GHSA-ggxq-hp9w-j794"
---

# Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765

## 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-2025-66202`
- 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-ggxq-hp9w-j794
- 影响版本: `introduced=0, fixed<5.15.8`
- 修复版本: `5.15.8`

## 对象与版本映射

- Advisory Scope: `package`
- 影响对象: `astro`
- Entity Refs: `astro, astro--project--astro`
- 版本置信度: `high`
- 版本缺口: `-`
- 版本证据源: `https://github.com/withastro/astro/security/advisories/GHSA-ggxq-hp9w-j794, https://github.com/withastro/astro/security/advisories/GHSA-whqg-ppgf-wp8c, https://nvd.nist.gov/vuln/detail/CVE-2025-64765, https://nvd.nist.gov/vuln/detail/CVE-2025-66202, https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce`

## 受控验证流程

- Workflow ID: `astro--CVE-2025-66202--workflow`
- 漏洞家族: `proxy-boundary`
- 入口面: `proxy-header-or-trust-boundary`
- 需要角色: `reverse-proxy-or-edge-client`
- 触发向量: 对 `proxy-boundary` 家族入口投递最小化、可审计、可回滚的受控输入，比较修复前后差异。
- 请求/页面入口: `/middleware, /x-forwarded-* trust path`
- 输入形态: 提交受控代理头或来源头，验证信任边界和回源鉴权。
- 预期不安全行为: 仅凭代理头即可越过鉴权或来源控制。

## 其他来源

- https://github.com/withastro/astro/security/advisories/GHSA-whqg-ppgf-wp8c
- https://nvd.nist.gov/vuln/detail/CVE-2025-64765
- https://nvd.nist.gov/vuln/detail/CVE-2025-66202
- https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce
- https://github.com/withastro/astro

## 证据点与补丁验证

### 服务端证据点

- 应用日志中的命中路径、鉴权决策和异常栈
- 反向代理或边界层日志中的请求头、来源 IP 与路由决策

### 浏览器证据点

- 基线截图与攻击后截图的 DOM/视觉差异
- console、network 与 response metadata 中的异常信号

### 数据库/文件系统证据点

- 数据库中新增/越权读取的测试数据
- 文件系统中新增上传样本、缓存条目或越权读取痕迹

### 检测信号

- WAF / reverse proxy 异常日志、访问日志和告警
- 应用审计日志中的权限错误、重定向异常、模板渲染或上传落盘事件
- 上游代理与应用层对 Content-Length / Transfer-Encoding / forwarded headers 的解释差异

### 补丁验证步骤

- 确认目标版本从 `introduced=0, fixed<5.15.8` 升级或回移到 `5.15.8`。
- 保留同一组受控输入，在修复前后分别执行并比对响应、日志与浏览器证据。
- 确认修复后仅保留预期业务行为，不再触发越权、回显、异常渲染或错误请求。
- 补充 `proxy-boundary` 族自动化回归，避免同类路径在插件、主题或代理链中回归。

### 实验安全备注

- 只使用回环地址、哨兵目标、无害样本或可回滚测试数据。
- 禁止造成持久破坏、越权下载真实数据或不可回滚 side effect。
- 如需浏览器证据，保留 baseline / proof 两份快照以及 console / network 记录。

## 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:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/javascript-typescript/proxy-trust-boundary.md)
- [nodejs:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/nodejs/proxy-trust-boundary.md)
- [java:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/java/proxy-trust-boundary.md)
- [php:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/php/proxy-trust-boundary.md)
- [python:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/python/proxy-trust-boundary.md)
- [ruby:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/ruby/proxy-trust-boundary.md)
- [csharp:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/csharp/proxy-trust-boundary.md)
- [go:proxy-trust-boundary](/Users/x/websafe/05-defense/secure-code/go/proxy-trust-boundary.md)