What is CVE-2019-15120?

CVE-2019-15120 is a medium-severity vulnerability in Kunena, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-08-16.

How severe is CVE-2019-15120?

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

Is CVE-2019-15120 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Kunena

CVE-2019-15120

The Kunena extension before 5.1.14 for Joomla! allows XSS via BBCode.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-08-16 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.014 (70.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Kunena

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

www.kunena.org/blog/207-kunena-5-1-14-released (Release Notes)
vel.joomla.org/resolved/2260-kunena-5-0-x-5-1-14-xss-cross-site-scripting (Third Party Advisory)
github.com/h3llraiser/CVE-2019-15120 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-15120?: CVE-2019-15120 is a medium-severity vulnerability in Kunena, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-08-16.
How severe is CVE-2019-15120?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2019-15120 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.