What is CVE-2025-70810?

CVE-2025-70810 is a high-severity vulnerability in phpBB, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-04-09.

How severe is CVE-2025-70810?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in phpBB

CVE-2025-70810

Cross Site Request Forgery vulnerability in Phpbb phbb3 v.3.3.15 allows a local attacker to execute arbitrary code via the login function and the authentication mechanism

Vulnerability class: CSRF (Cross-Site Request Forgery)

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

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (15.0th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · 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)
gist.github.com/ariefibis/80e306765c23d6fac1584dbb76822e30 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-70810?: CVE-2025-70810 is a high-severity vulnerability in phpBB, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-04-09.
How severe is CVE-2025-70810?: High severity. CVSS v3 base score is 8.8 out of 10.