What is CVE-2021-36739?

CVE-2021-36739 is a medium-severity vulnerability in Apache Pluto, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-06.

How severe is CVE-2021-36739?

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

XSS in Apache Pluto

CVE-2021-36739

The "first name" and "last name" fields of the Apache Pluto 3.1.0 MVCBean JSP portlet maven archetype are vulnerable to Cross-Site Scripting (XSS) attacks.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-01-06 · last modified 2026-06-17.

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: 0.023 (82.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Apache Pluto — versions 3.1.0
Apache Software Foundation Portals — versions org.apache.portals.pluto.archetype:mvcbean-jsp-portlet-archetype 3.1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

lists.apache.org/thread/m5j87nn1lmvzp8b9lmh7gqq68g5lnb7p (Vendor Advisory)

Frequently asked questions

What is CVE-2021-36739?: CVE-2021-36739 is a medium-severity vulnerability in Apache Pluto, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-06.
How severe is CVE-2021-36739?: Medium severity. CVSS v3 base score is 6.1 out of 10.