Quick answers
- Is CVE-2026-47366 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-47366 being exploited in the wild.
- How severe is CVE-2026-47366?
- High severity, with a CVSS score of 7.2, published 12 June 2026.
- Which products and versions are affected?
- phpBB phpBB.
- Is there a fix for CVE-2026-47366?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-47366 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-47366?
- Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A privilege escalation vulnerability exists in the phpBB Administration Control Panel (ACP) due to improper access control (CWE-284). The root cause is a failure to properly verify the current administrator's authorization level when they are modifying permission sets. An attacker with existing high-privilege (administrator) access can exploit this over the network to grant themselves or others permissions exceeding their intended scope. This allows for a vertical privilege escalation within the administrative interface, potentially leading to full compromise of the application's integrity and confidentiality. The issue was disclosed via HackerOne and affects the ACP component.
Affected products
- phpBB phpBB
Timeline
- 2026-06-12: disclosed: Initial publication of the CVE record.