What is CVE-2020-8226?

CVE-2020-8226 is a medium-severity vulnerability in phpBB, classified under Externally Controlled Reference to a Resource in Another Sphere. CVSS score: 5.8/10. Published 2020-08-17.

How severe is CVE-2020-8226?

Medium severity. CVSS v3 base score is 5.8 out of 10.

SSRF in phpBB

CVE-2020-8226

A vulnerability exists in phpBB <v3.2.10 and <v3.3.1 which allowed remote image dimensions check to be used to SSRF.

Published 2020-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.4th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

phpBB
Https://github.com/phpbb/phpbb — versions 3.2.10 and 3.3.1

Weakness classification (CWE)

References

www.phpbb.com/community/viewtopic.php (Patch, Release Notes, Vendor Advisory)
www.phpbb.com/community/viewtopic.php (Patch, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2020-8226?: CVE-2020-8226 is a medium-severity vulnerability in phpBB, classified under Externally Controlled Reference to a Resource in Another Sphere. CVSS score: 5.8/10. Published 2020-08-17.
How severe is CVE-2020-8226?: Medium severity. CVSS v3 base score is 5.8 out of 10.