webapp-headers-cors
-| | https://evil.com | Yes | Yes | | null | Yes | Yes | | http://localhost | Yes | Yes | | https://evil.
- License 许可
- MIT
- 最近更新
- 2026-09-01
- Stars
- ★ 0
- Forks
- 0
01 前言 Front Matter
- name
- webapp-headers-cors
- domain
- cybersecurity
- description
- -| | https://evil.com | Yes | Yes | | null | Yes | Yes | | http://localhost | Yes | Yes | | https://evil.
02 资源文件 1
- 参考文档index.json561 B
03 SKILL.md 正文
-| | https://evil.com | Yes | Yes | | null | Yes | Yes | | http://localhost | Yes | Yes | | https://evil.target.example.com | Yes | Yes |
Impact
- Any website can read authenticated API responses in victim's browser
- User profile data (email, phone, address) exfiltrable
- Session tokens exposed via X-Auth-Token header
- CSRF protection bypassed (attacker can read and submit anti-CSRF tokens)
Recommendation
- Implement a strict allowlist of trusted origins
- Never reflect arbitrary Origin values in Access-Control-Allow-Origin
- Do not allow Origin: null with credentials
- Validate origins with exact string matching, not regex substring matching
- Set Access-Control-Max-Age to a reasonable value (600 seconds)
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