Skip to content
Fencer Vulns
medium 5.3

CVE-2023-36674 json

An issue was discovered in MediaWiki before 1.35.11, 1.36.x through 1.38.x before 1.38.7, 1.39.x before 1.39.4, and 1.40.x before 1.40.1.

published 2023-08-20 3 y ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2023-36674 , EUVD-2023-40617

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

An issue was discovered in MediaWiki before 1.35.11, 1.36.x through 1.38.x before 1.38.7, 1.39.x before 1.39.4, and 1.40.x before 1.40.1. It is possible to bypass the Bad image list (aka badFile) by using the thumb parameter (aka Manualthumb) of the File syntax.

Patch / fix

  • bitnami mediawiki 1.35.11, 1.38.7, 1.39.4, 1.40.1
  • mediawiki mediawiki 1.35.11, 1.38.7, 1.39.4
  • mediawiki Debian 12 1:1.39.4-1~deb12u1
  • mediawiki Debian 14, Debian 13 1:1.39.4-1

debian advisories DEBIAN-CVE-2023-36674

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-36674 updated cvss 5.3

MediaWiki: Manualthumb bypasses badFile lookup

  • Red Hat OpenShift Container Platform 3.11 mediawiki
    affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami mediawiki
<1.35.11
>=1.36.0, <1.38.7
>=1.39.0, <1.39.4
>=1.40.0, <1.40.1
1.35.11
1.38.7
1.39.4
1.40.1

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.