CVE-2025-53490 Multiple XSS in CampaignEvents
Cross-site scripting vulnerability in the MediaWiki CampaignEvents extension allows attackers to inject malicious scripts, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-53490?
CVE-2025-53490 is a medium-severity cross-site scripting vulnerability in Wikimedia Foundation Mediawiki - CampaignEvents Extension, published on 3 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2025-53490?
It affects 1 product.
Products include Jly Campaignevents.
How do I fix CVE-2025-53490?
No fix has been published for CVE-2025-53490 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-53490 being exploited?
There is no known exploitation of CVE-2025-53490 in the wild and no public exploit code.
Sources
Also known as GHSA-9vrv-4cjj-vw3q.