CVE-2021-35463 Liferay Portal cross-site scripting (XSS) vulnerability in the Frontend Taglib module

What is CVE-2021-35463?

CVE-2021-35463 is a medium-severity cross-site scripting vulnerability in Liferay Liferay Portal, published on 4 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site scripting (XSS) vulnerability in the Frontend Taglib module in Liferay Portal 7.4.0 allows remote attackers to inject arbitrary web script or HTML into the management toolbar search via the `keywords` parameter.

Weakness: CWE-79

Which versions are affected by CVE-2021-35463?

4 open source packages ship an affected version, including com.liferay.portal:release.portal.bom and com.liferay:com.liferay.frontend.taglib.clay. It affects 1 product.

Products include Liferay Liferay Portal.

How do I fix CVE-2021-35463?

Upgrade com.liferay.portal:release.portal.bom to 7.4.1 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-2021-35463 being exploited?

There is no known exploitation of CVE-2021-35463 in the wild and no public exploit code.

Other vulnerabilities in Liferay Liferay Portal

• CVE-2020-7961 Liferay Portal Deserialization of Untrusted Data Exploited Critical 9.8
• CVE-2021-33990 File upload in n/a Critical 9.8
• CVE-2019-16891 Liferay Portal Allows RCE via Deserialization of a JSON Payload Critical 9.8
• CVE-2023-47797 Liferay Portal XSS with `p_l_back_url_title` on edit content page Critical 9.6
• CVE-2020-13445 Liferay Portal and Liferay DXP Vulnerable to Arbitrary Code Execution High 8.8

All Liferay Liferay Portal vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9h7f-5hc8-cj5f.