What is CVE-2018-15880?

CVE-2018-15880 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-08-29.

How severe is CVE-2018-15880?

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

XSS in Joomla Joomla\!

CVE-2018-15880

An issue was discovered in Joomla! before 3.8.12. Inadequate output filtering on the user profile page could lead to a stored XSS attack.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-08-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Joomla Joomla\!

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securityfocus.com/bid/105164 (VDB Entry, Third Party Advisory, vdb-entry)
developer.joomla.org/security-centre/744-20180802-core-stored-xss-vulnerability… (Vendor Advisory)
www.securitytracker.com/id/1041913 (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-15880?: CVE-2018-15880 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-08-29.
How severe is CVE-2018-15880?: Medium severity. CVSS v3 base score is 5.4 out of 10.