Improper Input Validation in Mediawiki Extension:SimpleCalendar by Wikimedia Foundation
CVE-2025-32077

6.9MEDIUM

Key Information:

Vendor

The Wikimedia Foundation

Status
Mediawiki - Extension:simplecalendar
Vendor
CVE Published:
11 April 2025

What is CVE-2025-32077?

The Mediawiki Extension:SimpleCalendar developed by the Wikimedia Foundation is susceptible to an improper input validation vulnerability, which can lead to Cross-Site Scripting (XSS) attacks. This flaw allows an attacker to craft malicious input that, when processed by the extension, can execute arbitrary scripts in users' browsers. This vulnerability affects versions 1.39 through 1.43 of the SimpleCalendar extension, posing a significant risk to users' security and confidentiality.

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Affected Version(s)

Mediawiki - Extension:SimpleCalendar 1.39 <= 1.43

References

https://phabricator.wikimedia.org/T383472
https://gerrit.wikimedia.org/r/q/Ic5b5ce8f7791026eff1aaff...

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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