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

Code

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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 - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the branch.

2. Jul 21, 2026 · NIST NVD

   Updated

   Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the branch.

Sources

• CVE.orgVulnerability recordCVE-2026-39935

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-39935

  Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the branch.

  nvd.nist.gov

References

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