What is CVE-2018-13258?

CVE-2018-13258 is a medium-severity vulnerability in MediaWiki, classified under Information Disclosure. CVSS score: 5.3/10. Published 2018-10-04.

How severe is CVE-2018-13258?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in MediaWiki

CVE-2018-13258

Mediawiki 1.31 before 1.31.1 misses .htaccess files in the provided tarball used to protect some directories that shouldn't be web accessible.

Vulnerability class: Information Disclosure

Published 2018-10-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.023 (82.3th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.023 · change: +0.002

Affected products

MediaWiki — versions 1.31 before 1.31.1

Weakness classification (CWE)

CWE-200 — Information Disclosure

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/T199029 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-13258?: CVE-2018-13258 is a medium-severity vulnerability in MediaWiki, classified under Information Disclosure. CVSS score: 5.3/10. Published 2018-10-04.
How severe is CVE-2018-13258?: Medium severity. CVSS v3 base score is 5.3 out of 10.