What is CVE-2026-21623?

CVE-2026-21623 is a medium-severity vulnerability in Stackideas Easydiscuss, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-16.

How severe is CVE-2026-21623?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Stackideas Easydiscuss

CVE-2026-21623

Lack of input filterung leads to a persistent XSS vulnerability in the forum post handling of the Easy Discuss component for Joomla.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (7.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Stackideas Easydiscuss
Stackideas.com Easydiscuss Extension For Joomla — versions 1.0.0-5.0.15

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@joomla.org (Product, product)

Frequently asked questions

What is CVE-2026-21623?: CVE-2026-21623 is a medium-severity vulnerability in Stackideas Easydiscuss, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-16.
How severe is CVE-2026-21623?: Medium severity. CVSS v3 base score is 5.4 out of 10.