CVE-2026-103438CWE-80

CVE-2026-103438

published September 30, 2026

CVSS
0.3
EPSS
0%
Percentile
1.1
In the wild
Unconfirmed
What it is

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikistories extension allows Cross-Site Scripting (XSS).

This issue affects MediaWiki Wikistories extension: 1.46, 1.45, and 1.43.

The record
Technical detail
CVSS
0.3 · NONE
CVSS v4.0
0.3 · CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
EPSS
0.00106 · 1.1th percentile
Weakness
CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Published
2026-09-30T22:18Z
References (2)
https://gerrit.wikimedia.org/r/q/Iad1281879723eba73e4338a00d5ff35c6eed0c3e · c4f26cc8-17ff-4c99-b5e2-38fc1793eacchttps://phabricator.wikimedia.org/T182213 · c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
EPSS history
Timeline
  • 02 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 30 SEP 17:32Z
    Various rawParams() and escaped() updates to prevent XSS in Wikistories extension
    cvelistv5