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CVE-2026-22660— FlaskBB Logic Flaw Authorization Group Deletion via Bulk AJAX Endpoint

Quick assessment

Affected
flaskbb flaskbb
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlaskBB FlaskBB是FlaskBB组织开源的一个使用 Flask 框架用 Python 编写的经典论坛软件。 FlaskBB 2.2.0及之前版本存在处理逻辑错误漏洞，该漏洞源于批量删除保护检查中存在类型不匹配的逻辑缺陷，允许认证管理员利用此问题删除所有内置权限组。

CVSS 7.2 · High EPSS 0.61% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
flaskbb flaskbb ≤ 2.2.0 affected
https://github.com/flaskbb/flaskbb/commit/a5da9a52 unaffected
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I. Basic Information for CVE-2026-22660

Vulnerability Information
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Vulnerability Title
FlaskBB Logic Flaw Authorization Group Deletion via Bulk AJAX Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
FlaskBB through 2.2.0, fixed in commit a5da9a5, contains a logic flaw vulnerability that allows authenticated administrators to delete all built-in authorization groups by exploiting a type mismatch in the bulk delete protection check. The bulk AJAX endpoint in the management views compares received JSON integer group IDs against string literals, causing the protection check to always pass, which allows deletion of all six built-in groups and destroys the forum's permission model, potentially rendering the site unusable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的比较
Source: CVE Program / CVE List V5
Vulnerability Title
FlaskBB 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlaskBB FlaskBB是FlaskBB组织开源的一个使用 Flask 框架用 Python 编写的经典论坛软件。 FlaskBB 2.2.0及之前版本存在处理逻辑错误漏洞，该漏洞源于批量删除保护检查中存在类型不匹配的逻辑缺陷，允许认证管理员利用此问题删除所有内置权限组。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
flaskbb flaskbb 0 ~ 2.2.0 -

II. Public POCs for CVE-2026-22660

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8034 chars
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III. Intelligence Information for CVE-2026-22660

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Patches & Fixes for CVE-2026-22660 (1)

Vendor Advisories for CVE-2026-22660 (2)

IV. Related Vulnerabilities

Same product: flaskbb
Same vendor: flaskbb
Same weakness: CWE-697