CVE-2025-59841— FlagForgeCTF's Improper Session Handling Allows Access After Logout
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I. Basic Information for CVE-2025-59841
Vulnerability Information
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Vulnerability Title
FlagForgeCTF's Improper Session Handling Allows Access After Logout
Source: NVD (National Vulnerability Database)
Vulnerability Description
Flag Forge is a Capture The Flag (CTF) platform. In versions from 2.2.0 to before 2.3.1, the FlagForge web application improperly handles session invalidation. Authenticated users can continue to access protected endpoints, such as /api/profile, even after logging out. CSRF tokens are also still valid post-logout, which can allow unauthorized actions. This issue has been patched in version 2.3.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
会话固定
Source: NVD (National Vulnerability Database)
Vulnerability Title
Flag Forge 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flag Forge是FlagForge开源的一个易于使用的CTF平台。 Flag Forge 2.2.0版本至2.3.1之前版本存在代码问题漏洞，该漏洞源于会话失效处理不当，可能导致未经授权的操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
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Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| FlagForgeCTF | flagForge | >= 2.2.0, < 2.3.1 | - |
II. Public POCs for CVE-2025-59841
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: flagForge
- CVE-2026-21868
Flag Forge has ReDoS Vulnerability in User Profile Lookup AP - CVE-2025-61777
FlagForge Allows Unauthenticated Badge Template API Access - CVE-2025-59932
FlagForgeCTF Unauthenticated Resource Modification/Deletion - CVE-2025-59843
FlagForgeCTF Exposes User Emails via Public /api/user/[usern - CVE-2025-59833
FlagForgeCTF Hint Exposure via API
Same vendor: FlagForgeCTF
- CVE-2026-21868
Flag Forge has ReDoS Vulnerability in User Profile Lookup AP - CVE-2025-61777
FlagForge Allows Unauthenticated Badge Template API Access - CVE-2025-59932
FlagForgeCTF Unauthenticated Resource Modification/Deletion - CVE-2025-59843
FlagForgeCTF Exposes User Emails via Public /api/user/[usern - CVE-2025-59833
FlagForgeCTF Hint Exposure via API
Same weakness: CWE-384
- CVE-2025-46605
Dell PowerProtect Data Domain（Dell PowerProtect DD） 安全漏洞 - CVE-2026-31940
Session Fixation in Chamilo LMS - CVE-2026-33946
MCP Ruby SDK: Insufficient Session Binding Allows SSE Stream - CVE-2026-33757
OpenBao lacks user confirmation for OIDC direct callback mod - CVE-2026-25101
Session Fixation in Bludit
V. Comments for CVE-2025-59841
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