CVE-2026-102778: Joomla Extension - svenbluege.de - Cross-site scripting and open redirect on the share mini page in Event Gallery extension < 6.6.0
Joomla Extension - svenbluege.de - Cross-site scripting and open redirect on the share mini page in Event Gallery extension < 6.6.0 - The page a shared image link opens (the share mini page of the front end) can link the article the image was shared from when the option "Share article links" is on. It took the address of the article from the shared link and printed it into the page without checking or escaping it; with the link type "Image Page with Redirect" it followed the address at once. A prepared link could therefore run a script in the page, in the session of the visitor who opened it, or send the visitor to another web site. Nothing on the server is changed or read by the server.
Affected Software
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Event Gallery versions earlier than 6.6.0 are affected when the "Share article links" option is enabled. The open redirect behavior specifically occurs when the link type is set to "Image Page with Redirect."
What must an attacker do to exploit it?
An attacker must prepare a shared image link containing a malicious article address and convince a visitor to open it. Depending on the link type, the crafted value can execute script in the visitor's session or immediately redirect the visitor to an external website.
Does exploitation alter or disclose server-side data?
No. The issue does not change data on the server or cause the server to read data.