Vulnerability · Published Aug 27, 2026 · Assigned by Joomla
CVE-2026-77989Joomla Extension - joomlaeventmanager.net - Reflected XSS via the PDF export link in Joomla Events Manager < 5.0.1
Medium 5.3
In plain English
A medium-severity cross-site scripting in JEM - Joomla Event Manager extension for Joomla from joomlaeventmanager.net. 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 - joomlaeventmanager.net - Reflected XSS via the PDF export link in Joomla Events Manager < 5.0.1 - buildCurrentPdfLink copies the current request query string into the PDF button URL, and pdfbutton() echoes it unescaped, leading to an reflected XSS vector.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| joomlaeventmanager.net | JEM - Joomla Event Manager extension for Joomla | 1.0.0-5.0.0 |
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