What is CVE-2018-0504?

CVE-2018-0504 is a medium-severity vulnerability in MediaWiki, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.5/10. Published 2018-10-04.

How severe is CVE-2018-0504?

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

Information disclosure in MediaWiki

CVE-2018-0504

Mediawiki 1.31 before 1.31.1, 1.30.1, 1.29.3 and 1.27.5 contains an information disclosure flaw in the Special:Redirect/logid

Published 2018-10-04 · 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: 0.028 (85.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

MediaWiki — versions before 1.31.1, 1.30.1, 1.29.3 and 1.27.5, 1.30.1, 1.27.5
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

lists.wikimedia.org/pipermail/wikitech-l/2018-September/090849.html (Vendor Advisory, mailing-list, Patch)
www.securitytracker.com/id/1041695 (VDB Entry, Third Party Advisory, vdb-entry)
phabricator.wikimedia.org/T187638 (Patch, Third Party Advisory)
www.debian.org/security/2018/dsa-4301 (vendor-advisory, Third Party Advisory)
access.redhat.com/errata/RHSA-2019:3238 (vendor-advisory)
access.redhat.com/errata/RHSA-2019:3813 (vendor-advisory)

Frequently asked questions

What is CVE-2018-0504?: CVE-2018-0504 is a medium-severity vulnerability in MediaWiki, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.5/10. Published 2018-10-04.
How severe is CVE-2018-0504?: Medium severity. CVSS v3 base score is 6.5 out of 10.