What is CVE-2025-43820?

CVE-2025-43820 is a medium-severity vulnerability in Liferay Digital Experience Platform, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-09-29.

How severe is CVE-2025-43820?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Liferay Digital Experience Platform

CVE-2025-43820

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Liferay Digital_experience_platform — versions 7.3, 7.4
Liferay Dxp — versions 7.3.10-u25, 7.4.13-u35, 2023.Q3.1
Liferay Liferay_portal
Liferay Portal — versions 7.4.3.35

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@liferay.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-43820?: CVE-2025-43820 is a medium-severity vulnerability in Liferay Digital Experience Platform, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-09-29.
How severe is CVE-2025-43820?: Medium severity. CVSS v3 base score is 5.4 out of 10.