CVE-2026-47366: Phpbb

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

Improper verification of access permissions when modifying permissions through the Administration Control Panel (ACP) allowed an authenticated administrator to grant permissions beyond the level authorized for their account, resulting in privilege escalation within the administrative interface.

Affected products

• Phpbb Phpbb: from 3.3.0, up to and including 3.3.16

Published 2026-06-12. Last modified 2026-06-17.