CVE-2026-100383CWE-79cross-site-scripting

CVE-2026-100383

published September 26, 2026

CVSS
4.8
EPSS
0%
Percentile
23.3
In the wild
Unconfirmed
What it is

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension allows Cross-Site Scripting (XSS).

This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.

The record
Technical detail
CVSS
4.8 · NONE
CVSS v4.0
4.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00316 · 23.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-26T02:17Z
References (2)
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/1326391 · c4f26cc8-17ff-4c99-b5e2-38fc1793eacchttps://phabricator.wikimedia.org/T434967 · c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
EPSS history
Timeline
  • 27 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 25 SEP 21:05Z
    Stored i18n XSS in WikiLambda's VisualEditor integration
    cvelistv5