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CVE PROGRAM SOURCE RECORD7.2 High

CVE-2026-22659

FlaskBB Authorization Bypass via Topic ID Manipulation

Description

FlaskBB through 2.2.0, fixed in commit acc88cf, contains an authorization bypass vulnerability that allows authenticated moderators to perform unauthorized actions on topics in forums they do not control by submitting crafted topic ID lists. Attackers can include a low-ID topic from a permitted forum as an anchor in a batch request, causing the permission check applied only to the first result to pass, and then execute lock, unlock, delete, or hide actions against topics in unmoderated forums.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

flaskbb flaskbb

Default version status: affected

  • 0 to ≤ 2.2.0affected
  • https://github.com/flaskbb/flaskbb/commit/a5da9a52unaffected
pkg:github/flaskbb/flaskbb

References