What is CVE-2019-12466?

CVE-2019-12466 is a high-severity vulnerability in MediaWiki, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2019-07-10.

How severe is CVE-2019-12466?

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

CSRF in MediaWiki

CVE-2019-12466

Wikimedia MediaWiki through 1.32.1 allows CSRF.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2019-07-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.6th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000

Affected products

MediaWiki
Debian Linux — versions 9.0

Weakness classification (CWE)

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

References

www.debian.org/security/2019/dsa-4460 (vendor-advisory, Third Party Advisory)
seclists.org/bugtraq/2019/Jun/12 (mailing-list, Mailing List, Third Party Advisory)
lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html (Patch, Third Party Advisory)
phabricator.wikimedia.org/T25227 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-12466?: CVE-2019-12466 is a high-severity vulnerability in MediaWiki, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2019-07-10.
How severe is CVE-2019-12466?: High severity. CVSS v3 base score is 8.8 out of 10.