Medium severity · published Jul 3, 2025
CVE-2025-53490
Multiple XSS in CampaignEvents
5.6
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
Mediawiki - CampaignEvents Extension · Wikimedia Foundation
1.43.x before 1.43.2 · source: vendor
CA
Campaignevents · Jly
All versions, or not specified · source: NVD
Affected product
MC
Mediawiki - CampaignEvents Extension
Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-53490
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-53490
Patch
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CampaignEvents/+/1165949
Issue Tracking
https://phabricator.wikimedia.org/T395622
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CampaignEvents API missing authorization exposes meeting and chat URLs