CVE-2025-52132 in Mocca Calendar
Summary
by MITRE • 08/03/2025
The Mocca Calendar application before 2.15 for XWiki allows XSS via a title to the view event page.
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Analysis
by VulDB Data Team • 08/03/2025
The Mocca Calendar application for XWiki presents a cross-site scripting vulnerability in versions prior to 2.15 that enables attackers to inject malicious scripts through event titles. This vulnerability exists within the view event page functionality where user-provided title content is not properly sanitized or escaped before being rendered in the web interface. The flaw represents a classic XSS attack vector that can be exploited by malicious users who have the ability to create or modify calendar events.
The technical implementation of this vulnerability stems from insufficient input validation and output escaping mechanisms within the calendar application's rendering pipeline. When a user submits an event with a malicious title containing script tags or other harmful code, the application fails to properly encode or filter this content before displaying it on the view event page. This allows attackers to execute arbitrary JavaScript code within the context of other users' browsers who view the affected calendar events.
The operational impact of this vulnerability extends beyond simple script execution as it can enable various malicious activities including session hijacking, credential theft, and redirection to malicious sites. An attacker could craft a specially formatted event title that when viewed by other users would execute malicious scripts to steal session cookies or redirect users to phishing pages. The vulnerability affects all users of the calendar application who have access to create or modify events, potentially compromising the entire user base that interacts with the calendar functionality.
This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and maps to ATT&CK technique T1566.001 for initial access through malicious links or content. The risk is amplified in environments where the calendar application is widely used and where users trust the content displayed within it. Organizations utilizing XWiki with the Mocca Calendar plugin should prioritize immediate patching to version 2.15 or later where the XSS protection mechanisms have been implemented. Additionally, administrators should consider implementing additional security measures such as content security policies and input validation at multiple layers to reduce the attack surface.
Mitigation strategies include applying the vendor-provided patch immediately, implementing proper input sanitization for all user-provided content, and configuring web application firewalls to detect and block suspicious script patterns. Organizations should also conduct security awareness training for users who have the ability to create calendar events, emphasizing the dangers of including untrusted content in event titles. Regular security assessments of web applications and automated vulnerability scanning should be implemented to identify similar issues in other components of the XWiki platform or related applications that may be vulnerable to similar cross-site scripting attacks.