Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension al…

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 7, 2026 · NIST NVD

   Detected

   Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension allows Cross-Site Scripting (XSS). The issue has been remediated on the branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.

2. Jul 21, 2026 · NIST NVD

   Updated

   Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension allows Cross-Site Scripting (XSS). The issue has been remediated on the branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.

Sources

• CVE.orgVulnerability recordCVE-2026-39933

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-39933

  Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension allows Cross-Site Scripting (XSS). The issue has been remediated on the branch, and in the release branche

  nvd.nist.gov

References

• Reference · gerrit.wikimedia.org
• Reference · phabricator.wikimedia.org