CVE-2026-102776
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
In the Joomla Event Gallery extension versions below 6.6.0, eight tasks called by back-end list buttons do not check the form token. A prepared page on another site could trigger them in the name of a logged-in administrator and change settings and flags.
Risk Assessment
An attacker can change shop configuration, payment methods, order statuses, and other settings on behalf of an administrator, leading to unauthorized modifications.
Recommendation
Update the Event Gallery extension to version 6.6.0 or later, which adds form token verification for these tasks.
Other vulnerabilities in Event Gallery
See all- CVE-2026-102777Medium
The Joomla extension Event Gallery versions < 6.6.0 contains a server-side request forgery vulnerability in the Google Photos picker on the back-end upload page. The picker fetches thumbnails of picked images through the server, using the OAuth access token of the Google Photos account. The task takes the address from the request without checking it and asks for no form token. A prepared page on another web site could make the server send the access token to any address, or fetch addresses inside the server's network, in the name of a logged in administrator.
- CVE-2026-102778Medium
In the Joomla Event Gallery extension versions below 6.6.0, there is XSS and open redirect on the share mini page. The article address from the shared link is printed without checking or escaping, and with the link type "Image Page with Redirect" it follows the address immediately.
- CVE-2026-97165Medium
Joomla Extension - svenbluege.de - Reflected XSS and open redirect in Event Gallery extension < 6.5.0 - The “return” parameter is base64-decoded and written to the “Back” link without being validated.
- CVE-2026-97164High
Joomla Extension - svenbluege.de - Authenticated arbitrary path deletion in 'clear cache' task in Event Gallery extension < 6.5.0 - Using the 'images' parameter of the 'cache.process' task, you can recursively delete any directories that the web server is authorized to write to.
- CVE-2026-100749Medium
Joomla Extension - svenbluege.de - CSRF in backend cleanup actions in Event Gallery extension < 6.5.0 - Only orphaned file entries and shopping carts that are older than 30 days will be deleted.
- CVE-2026-100748High
Joomla Extension - svenbluege.de - CSRF in various cart actions in Event Gallery extension < 6.5.0
- CVE-2026-100747Medium
Joomla Extension - svenbluege.de - CSRF in image upload in Event Gallery extension < 6.5.0 - Due to lack of an CSRF token check, a third-party site can upload files to an event and overwrite existing files with the same name.
Original NVD description (English source)
Joomla Extension - svenbluege.de - Cross-site request forgery of list tasks of the backend in Event Gallery extension < 6.6.0 - Eight tasks which the buttons of the back-end lists call did not check the form token: setting the default payment method, shipping method, image type set, order status and watermark; putting an event into the shop or taking it out; choosing the main image of an event and whether an image is shown only as the main image; and sorting the images of an event. A prepared page on another web site could trigger them in the name of a logged in administrator and change those settings and flags. Nothing can be deleted or read this way; orders are not affected.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS