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Fencer Vulns
medium 6.5

CVE-2023-45359 json

An issue was discovered in the Vector Skin component for MediaWiki before 1.39.5 and 1.40.x before 1.40.1.

published 2024-10-09 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-49652

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

An issue was discovered in the Vector Skin component for MediaWiki before 1.39.5 and 1.40.x before 1.40.1. vector-toc-toggle-button-label is not escaped, but should be, because the line param can have markup.

Patch / fix

  • mediawiki vector_skin 1.39.5, 1.40.1
  • mediawiki Debian 12 1:1.39.5-1~deb12u1
  • mediawiki Debian 14, Debian 13 1:1.39.5-1

debian advisories DEBIAN-CVE-2023-45359

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-2023-45359 updated cvss 4.2

mediawiki: Improper Input Handling in MediaWiki Vector Skin

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

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

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

  • mediawiki vector_skin

Classification

Weakness
  • CWE-116 Improper Encoding or Escaping of Output

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.