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VulnerabilityPublished Updated

CVE-2026-103050: mediawiki · Cross-site Scripting

Affects mediawikiSource GCVE Database

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Authoritative record:CVE-2026-103050· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium.

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.
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

Affected software

ProductAffectedFixed 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–
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 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 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 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 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–

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

AI-suggested

The vulnerability affects versions prior to 1.43.10, 1.45.5, and 1.46.1, so upgrading to these or later versions is likely required.

Description

A stored cross-site scripting (XSS) vulnerability exists in the Mediawiki MassMessage extension prior to versions 1.43.10, 1.45.5, and 1.46.1. This vulnerability is caused by improper neutralization of input during web page generation, which could allow an attacker to inject malicious scripts. The vulnerability has a medium severity rating with a CVSS score of 6.1.

References

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