Liferay Portal vulnerable to cross-site scripting in the Calendar widget
Date: 2025-09
Affected: maven/com.liferay:com.liferay.calendar.web, maven/com.liferay.portal:release.portal.bom
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2025-43818
CVE-2025-43820
CWE: CWE-79

Multiple cross-site scripting (XSS) vulnerabilities in the Calendar widget when inviting users to a event in Liferay Portal 7.4.3.35 through 7.4.3.110, and Liferay DXP 2023.Q4.0 through 2023.Q4.4, 2023.Q3.1 through 2023.Q3.6, 7.4 update 35 through update 92, and 7.3 update 25 through update 35 allow remote attackers to inject arbitrary web script or HTML via a crafted payload injected into a user’s (1) First Name, (2) Middle text, or (3) Last Name text fields.


Mitigations:

Architectural layers (MAESTRO):