What’s Vulnerable › Vulnerabilities

CVE-2025-32077: XSSes in Extension:SimpleCalendar

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-11 · updated 2026-06-17
• Weakness: CWE-20

Description

Improper Input Validation vulnerability in The Wikimedia Foundation Mediawiki - Extension:SimpleCalendar allows Cross-Site Scripting (XSS).This issue affects Mediawiki - Extension:SimpleCalendar: from 1.39 through 1.43.

Affected products

• The Wikimedia Foundation Mediawiki - Extension:SimpleCalendar: from 1.39 through 1.43

References

• https://gerrit.wikimedia.org/r/q/Ic5b5ce8f7791026eff1aafffb32a68f3aab119be
• https://phabricator.wikimedia.org/T383472

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