What is CVE-2021-23124?

CVE-2021-23124 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-01-12.

How severe is CVE-2021-23124?

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

Is CVE-2021-23124 known to be exploited?

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

XSS in Joomla Joomla\!

CVE-2021-23124

An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.813 (99.6th percentile) — read the EPSS interpretation.

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.

Affected products

Joomla Joomla\!
Joomla! Project Cms — versions 3.9.0-3.9.23

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

security@joomla.org (vendor-advisory, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-23124?: CVE-2021-23124 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-01-12.
How severe is CVE-2021-23124?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-23124 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.