svenbluege.de Event Gallery Extension up to 6.5.x Google Photos picker server-side request forgery

Summaryinfo

A vulnerability has been found in svenbluege.de Event Gallery Extension up to 6.5.x and classified as problematic. This vulnerability affects unknown code of the component Google Photos picker. This manipulation causes server-side request forgery. This vulnerability is tracked as CVE-2026-102777. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in svenbluege.de Event Gallery Extension up to 6.5.x. It has been declared as problematic. Affected by this vulnerability is an unknown part of the component Google Photos picker. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality. The summary by CVE is:

Joomla Extension - svenbluege.de - Server-side request forgery in the Google Photos picker in Event Gallery extension < 6.6.0 - The Google Photos picker of the back-end upload page fetches the thumbnails of the picked images through the server, with the OAuth access token of the Google Photos account. The task took the address to fetch from the request without checking it and asked for no form token. A prepared page on another web site could therefore make the server send the access token of the account to any address, or fetch addresses inside the server's network, in the name of a logged in administrator; a back-end user with the permission "Manage" could do the same directly. The token is valid for about an hour and reaches what the picker session of the account reaches.

It is possible to read the advisory at svenbluege.de. This vulnerability is known as CVE-2026-102777 since 09/29/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/05/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Photo Gallery Software

Vendor

• svenbluege.de

Name

• Event Gallery Extension

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5

CPE 2.3info

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CPE 2.2info

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Entryinfo

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