What is CVE-2021-29039?

CVE-2021-29039 is a medium-severity vulnerability in Liferay Portal, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-16.

How severe is CVE-2021-29039?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Liferay Portal

CVE-2021-29039

Cross-site scripting (XSS) vulnerability in the Asset module's categories administration page in Liferay Portal 7.3.4 allows remote attackers to inject arbitrary web script or HTML via the site name.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-05-16 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Liferay Portal — versions 7.3.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5m… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-29039?: CVE-2021-29039 is a medium-severity vulnerability in Liferay Portal, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-16.
How severe is CVE-2021-29039?: Medium severity. CVSS v3 base score is 6.1 out of 10.