Vulnerability · Published Aug 24, 2026 · Assigned by Joomla
CVE-2026-77993Joomla Extension - joomlack.fr - Reflected XSS in Page Builder CK < 3.6.5
Medium 5.3
In plain English
A medium-severity cross-site scripting in Page Builder CK extension for Joomla from joomlack.fr. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 4.0)5.3Medium
Exploit odds (30 days)0.4%top 61.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Joomla Extension - joomlack.fr - Reflected XSS in Page Builder CK < 3.6.5 - The Joomla extension Page Builder CK is vulnerable to a reflected XSS via the iscontenttype parameter.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| joomlack.fr | Page Builder CK extension for Joomla | 1.0.0-3.6.4 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
References
- https://www.joomlack.fr/ product