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VulnerabilityPublished Updated

CVE-2026-103045: mediawiki · Cross-site Scripting

Affects mediawikiSource GCVE Database

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Authoritative record:CVE-2026-103045· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium · fixed in 1.46.1 : update mediawiki when convenient.

Data as of 12 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.46.1, 1.45.5, 1.43.10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade wikimedia/skins/Refreshed to 1.46.1, 1.45.5 or 1.43.10.

Affected software

ProductAffectedFixed in
Ubuntu 18.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=bionicOther threatsAffected
  • 1:1.27.3-1 – 1:1.27.4-3
4 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/focalOther threatsAffected
  • 1:1.31.2-1ubuntu1 – 1:1.31.7-1ubuntu0.1~esm1
9 affected builds
Fixed in–
Ubuntu Pro 22.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 1:1.35.3-1 – 1:1.35.6-1ubuntu0.1~esm1
8 affected builds
Fixed in–
Ubuntu Pro 24.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/nobleOther threatsAffected
  • 1:1.39.4-2 – 1:1.39.7-1ubuntu0.1~esm1
5 affected builds
Fixed in–
Ubuntu 26.04 LTSmediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=resoluteOther threatsAffected
  • 1:1.43.3+dfsg-1 – 1:1.43.8+dfsg-2
5 affected builds
Fixed in–
Ubuntu 26.10mediawikipkg:deb/ubuntu/mediawiki?arch=source&distro=stonkingOther threatsAffected
  • =1:1.43.8+dfsg-2
  • =1:1.43.9+dfsg-1
  • =1:1.43.9+dfsg-1ubuntu1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, users should consider disabling or avoiding use of the Refreshed skin or applying any available vendor mitigations.

Description

A stored cross-site scripting (XSS) vulnerability exists in the Refreshed skin of The Wikimedia Foundation's Mediawiki software. This vulnerability arises from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts. It affects multiple versions of Mediawiki prior to 1.46.1, including several specific earlier versions. The vulnerability has a medium severity rating with a CVSS score of 6.1.

References

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