CVE-2026-103050: Stored i18n XSS in MassMessage

Published Sep 29, 2026
·
Updated

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.

Affected Software

1 affected component
Wikimedia Foundation MediaWiki MassMessage extension<1.46.1, <1.45.5, <1.43.10

Event History

Sep 29, 2026
CVE Published
via MITRE·11:11 PM
Data Sourced
via MITRE·11:11 PM
DescriptionWeakness
Sep 30, 2026
Data Sourced
via NVD·12:16 AM
DescriptionWeakness

Frequently Asked Questions

1

Which releases should be upgraded to remediate this issue?

Upgrade the MassMessage extension to 1.46.1, 1.45.5, or 1.43.10, as applicable to the MediaWiki release branch in use. Versions earlier than those releases are affected.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203