CVE-2025-43820 Liferay Portal vulnerable to cross-site scripting in the Calendar widget
Remote attackers can inject arbitrary web script or HTML via user name fields in the Calendar widget, potentially leading to session hijacking or malicious actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-43820?
CVE-2025-43820 is a medium-severity cross-site scripting vulnerability in Liferay Digital Experience Platform, published on 29 Sep 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-43820?
4 open source packages ship an affected version, including com.liferay.portal:release.portal.bom and com.liferay:com.liferay.calendar.web. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
com.liferay.portal:release.portal.bom Maven | From 7.4.3.35-ga35 | 7.4.3.111-ga111 |
com.liferay.portal:release.portal.bom Maven | From 7.4.3.35-ga35 | 7.4.3.111-ga111 |
com.liferay:com.liferay.calendar.web Maven | From 5.0.45 | 5.0.88 |
com.liferay:com.liferay.calendar.web Maven | From 5.0.45 | 5.0.88 |
Products include Liferay Digital Experience Platform, Liferay Liferay Portal.
How do I fix CVE-2025-43820?
Upgrade com.liferay.portal:release.portal.bom to 7.4.3.111-ga111 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-43820 being exploited?
There is no known exploitation of CVE-2025-43820 in the wild and no public exploit code.
Other vulnerabilities in Liferay Digital Experience Platform
- CVE-2024-8980 Liferay Portal and Liferay DXP Vulnerable to CSRF in the Script Console
- CVE-2023-42496 Liferay Portal and Liferay DXP vulnerable to reflected Cross-site Scripting
- CVE-2023-42498 Liferay Portal Language Override edit screen and Liferay DXP vulnerable to reflected Cross-site Scripting
- CVE-2024-25147 Liferay Portal and Liferay DXP vulnerable to Cross-site Scripting
- CVE-2024-26269 Liferay Portal Frontend JS module's portlet.js and Liferay DXP vulnerable to Cross-site Scripting
Sources
Also known as GHSA-pf86-4w35-cj89.