What is CVE-2019-12470?

CVE-2019-12470 is a medium-severity vulnerability in MediaWiki, classified under Missing Authorization. CVSS score: 6.5/10. Published 2019-07-10.

How severe is CVE-2019-12470?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in MediaWiki

CVE-2019-12470

Wikimedia MediaWiki through 1.32.1 has Incorrect Access Control. Suppressed log in RevisionDelete page is exposed. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Vulnerability class: Broken Access Control

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.014 (71.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

MediaWiki
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-862 — Missing Authorization

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, Issue Tracking)
phabricator.wikimedia.org/T222038 (Third Party Advisory)
lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html (Mailing List, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2019-12470?: CVE-2019-12470 is a medium-severity vulnerability in MediaWiki, classified under Missing Authorization. CVSS score: 6.5/10. Published 2019-07-10.
How severe is CVE-2019-12470?: Medium severity. CVSS v3 base score is 6.5 out of 10.