CVE-2025-53490: Multiple XSS in CampaignEvents

Severity: medium (CVSS 5.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-03 · updated 2026-06-17
Weakness: CWE-79

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - CampaignEvents Extension: from 1.43.X before 1.43.2.

Affected products

Jly Campaignevents: all versions

References

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CampaignEvents/+/1165949
https://phabricator.wikimedia.org/T395622

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