What is CVE-2025-70811?

CVE-2025-70811 is a medium-severity vulnerability in phpBB, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2026-04-09.

How severe is CVE-2025-70811?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CSRF in phpBB

CVE-2025-70811

Cross Site Request Forgery vulnerability in Phpbb phbb3 v.3.3.15 allows a local attacker to execute arbitrary code via the Admin Control Panel icon management functionality.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2026-04-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (3.7th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

phpBB — versions 3.3.15

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/ariefibis (Not Applicable)
www.linkedin.com/in/mohammed-a-6a2548112/ (Not Applicable)
github.com/ariefibis/PHPBB/security/advisories/GHSA-56pv-xg3w-6822 (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2025-70811?: CVE-2025-70811 is a medium-severity vulnerability in phpBB, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2026-04-09.
How severe is CVE-2025-70811?: Medium severity. CVSS v3 base score is 4.3 out of 10.