What is CVE-2024-40748?

CVE-2024-40748 is a high-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 7.5/10. Published 2025-01-07.

How severe is CVE-2024-40748?

High severity. CVSS v3 base score is 7.5 out of 10.

XSS in Joomla Joomla\!

CVE-2024-40748

Lack of output escaping in the id attribute of menu lists.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-01-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (33.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Joomla Joomla\!
Joomla! Project Cms — versions 3.0.0-3.10.19, 4.0.0-4.4.9, 5.0.0-5.2.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

developer.joomla.org/security-centre/955-20250102-core-xss-vector-in-the-id-att… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2024-40748?: CVE-2024-40748 is a high-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 7.5/10. Published 2025-01-07.
How severe is CVE-2024-40748?: High severity. CVSS v3 base score is 7.5 out of 10.