PT-2026-57163 · Flaskbb · Flaskbb

Hamed Kohi + 1 · Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-22660

NVD

CVSS v3.1

7.2

High

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Weakness Enumeration

CWE-697

Related Identifiers

CVE-2026-22660

Affected Products

Flaskbb

References · 4

• https://github.com/flaskbb/flaskbb/commit/a5da9a529adddc65fe31e275192b642a4e32de64 · Patch
• https://github.com/flaskbb/flaskbb/security/advisories/GHSA-r9cf-jxr6-5h3r · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22660 · Security Note
• https://vulncheck.com/advisories/flaskbb-logic-flaw-authorization-group-deletion-via-bulk-ajax-endpoint · Note