What is CVE-2026-48905?

CVE-2026-48905 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-26.

How severe is CVE-2026-48905?

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

XSS in Joomla Joomla\!

CVE-2026-48905

Lack of input filtering leads to an XSS vector in the HTML filter code.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (0.3th 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 Framework Filter Package — versions 1.0.0-3.0.5, 4.0.0-4.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-48905?: CVE-2026-48905 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-26.
How severe is CVE-2026-48905?: Medium severity. CVSS v3 base score is 6.1 out of 10.