N/A

CVSS Score

-

CVSS Score

Basic Information

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CVE-2025-43818

CVE-2025-43818: Liferay Portal vulnerable to cross-site scripting in the Calendar widget

Cross-site scripting (XSS) vulnerability in the Calendar widget 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 36 allows remote attackers to inject arbitrary web script or HTML via a crafted payload injected into a Calendar's “Name” text field

(GitHub Advisory)

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CVE-2025-43818

CVE-2025-43818:

N/A

CVSS Score

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
com.liferay:com.liferay.calendar.web	maven	>= 5.0.45, < 5.0.87	5.0.87

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The analysis of the provided patches points directly to a single vulnerable function. The commit ed066f19934a721a7f9b567db097e04cf4adbdae explicitly shows the fix for the cross-site scripting (XSS) vulnerability. The change is located in the com.liferay.calendar.web.internal.util.CalendarUtil.java file, within the toCalendarJSONObject static method. The vulnerability was caused by the failure to escape the calendar's name before it was added to a JSON object. An attacker could create a calendar with a malicious name containing a script payload. When the calendar is rendered, the toCalendarJSONObject function would be called, and the unsanitized name would be sent to the client-side, where the script would execute in the user's browser. The patch addresses this by using HtmlUtil.escape() to sanitize the name. The second commit, ff1d01a6bd2898e827b1efdf723ef24f7f2bb1bf, adds a test case that confirms this vulnerability by creating a calendar with a malicious name and asserting that the output of toCalendarJSONObject is properly escaped. Therefore, com.liferay.calendar.web.internal.util.CalendarUtil.toCalendarJSONObject is the precise function that would appear in a runtime profile during the exploitation of this vulnerability.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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