CVE-2026-21623 is a persistent Cross-Site Scripting (XSS) vulnerability found in the forum post handling of the Easy Discuss component for Joomla, stemming from insufficient input filtering. Rated as MEDIUM severity with a CVSS score of 5.4, this vulnerability requires user interaction and low privileges for exploitation, potentially leading to limited impact on confidentiality and integrity. While there is no evidence of active exploitation, readily available exploit code, or inclusion in the KEV catalog, the vulnerability has garnered significant community discussion with 10 mentions.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.0.0, <= 5.0.15CPE matchmatch criteria | cpe:2.3:a:stackideas:easydiscuss:*:*:*:*:*:joomla\!:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.