CVE-2026-21631

Lack of output escaping leads to a XSS vector in the multilingual associations component.

CVSS 4.0

5.9CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U

CVSS 3.1

5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-26)

CWE

CWE-79

Published

2026-04-01

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• joomla:joomla\!

References

• https://developer.joomla.org/security-centre/1029-20260303-core-xss-vector-in-com-associations-comparison-view.html
• https://github.com/Shirshaw64p/security-advisories/tree/main/CVE-2026-21631

Check your stackJSON