Liferay Portal Email Modification Vulnerability via Calendar Portlet
Date: 2025-08
Affected: maven/com.liferay:com.liferay.calendar.service
Attack vector: phishing
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2025-43739
CWE: CWE-203

Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2025.Q1.0 through 2025.Q1.6, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.16 and 7.4 GA through update 92 allow any authenticated user to modify the content of emails sent through the calendar portlet, allowing an attacker to send phishing emails to any other user in the same organization. Liferay Portal is fixed on the master branch from commit ff18e7d.


Mitigations:

Architectural layers (MAESTRO):