CVE-2026-103050

UNKNOWN 0.0

Stored i18n XSS in MassMessage

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS. This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.

CWE	CWE-79
Vendor	the wikimedia foundation
Product	mediawiki - massmessage extension
Published	Sep 29, 2026

Stay Ahead of the Next One

Get instant alerts for the wikimedia foundation mediawiki - massmessage extension

Be the first to know when new unknown vulnerabilities affecting the wikimedia foundation mediawiki - massmessage extension are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

The Wikimedia Foundation / Mediawiki - MassMessage extension

0 < 1.46.1, 1.45.5, 1.43.10

References

NVD ↗ CVE.org ↗ EPSS Data ↗

phabricator.wikimedia.org: https://phabricator.wikimedia.org/T432341 gerrit.wikimedia.org: https://gerrit.wikimedia.org/r/c/1346089

Credits

SomeRandomDeveloper SomeRandomDeveloper