What is CVE-2019-12473?

CVE-2019-12473 is a high-severity vulnerability in MediaWiki. CVSS score: 7.5/10. Published 2019-07-10.

How severe is CVE-2019-12473?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in MediaWiki

CVE-2019-12473

Wikimedia MediaWiki 1.27.0 through 1.32.1 might allow DoS. Passing invalid titles to the API could cause a DoS by querying the entire watchlist table. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.023 (83.3th percentile), scored 2026-10-26.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

MediaWiki
Debian Linux — versions 9.0

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)
phabricator.wikimedia.org/T204729 (Third Party Advisory)
lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-12473?: CVE-2019-12473 is a high-severity vulnerability in MediaWiki. CVSS score: 7.5/10. Published 2019-07-10.
How severe is CVE-2019-12473?: High severity. CVSS v3 base score is 7.5 out of 10.