CVE-2026-47366 Privilege escalation in phpBB
Authenticated administrators can escalate privileges beyond their authorized level via the Administration Control Panel, requiring a patch for phpBB.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47366?
CVE-2026-47366 is a high-severity vulnerability in phpBB, published on 12 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-284
Which versions are affected by CVE-2026-47366?
How do I fix CVE-2026-47366?
No fix has been published for CVE-2026-47366 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-47366 being exploited?
There is no known exploitation of CVE-2026-47366 in the wild and no public exploit code.
Sources
Also known as GHSA-f8mc-8mhv-jcrc.