What is CVE-2024-21723?

CVE-2024-21723 is a medium-severity vulnerability in Joomla Joomla\!, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2024-02-29.

How severe is CVE-2024-21723?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Open Redirect in Joomla Joomla\!

CVE-2024-21723

Inadequate parsing of URLs could result into an open redirect.

Vulnerability class: Open Redirect

Published 2024-02-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (43.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Joomla Joomla\!
Joomla! Project Cms — versions 1.5.0-3.10.14, 4.0.0-4.4.2, 5.0.0-5.0.2

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

developer.joomla.org/security-centre/926-20240202-core-open-redirect-in-install… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2024-21723?: CVE-2024-21723 is a medium-severity vulnerability in Joomla Joomla\!, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2024-02-29.
How severe is CVE-2024-21723?: Medium severity. CVSS v3 base score is 4.3 out of 10.