CVE-2026-22659

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/flaskbb/flaskbb/commit/acc88cfedd011124395e0101cb27432a47f712be
https://github.com/flaskbb/flaskbb/security/advisories/GHSA-9rjj-9p2h-6c55
https://www.vulncheck.com/advisories/flaskbb-authorization-bypass-via-topic-id-manipulation
https://github.com/flaskbb/flaskbb/security/advisories/GHSA-9rjj-9p2h-6c55

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-10 14:16

Updated : 2026-07-14 16:16

NVD link : CVE-2026-22659

Mitre link : CVE-2026-22659

CVE.ORG link : CVE-2026-22659

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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