The extension provides a public proxy endpoint that fetches a URL on behalf of the visitor. For one HTTP request method, the endpoint does not apply the authorization check that protects the other methods, so the URL it fetches is fully controlled by the requester. An unauthenticated attacker can make the server send requests to arbitrary internal or external hosts. The attacker receives the status code and selected response headers, which allows probing of internal hosts and ports. Response bodies are not disclosed.

An issue was discovered in the Kitodo.Presentation (aka dif) extension before 2.3.2, 3.x before 3.2.3, and 3.3.x before 3.3.4 for TYPO3. A missing access check in an eID script allows an unauthenticated user to submit arbitrary URLs to this component. This results in SSRF, allowing attackers to view the content of any file or webpage the webserver has access to.

Impact Kitodo.Presentation fails to properly encode URL parameters for output in HTML making it vulnerable to Cross Site Scripting (XSS). Only sites using the ListView, Navigation or PageView plugins are affected.

It also includes jQuery 3.4.1 which is known to be vulnerable against Cross Site Scripting, although there is currently no known way to exploit this in Kitodo.Presentation.

Patches An updated version of Kitodo.Presentation is available on GitHub, Packagist and in the TYPO3 Extension Repository. Users are advised to update as soon as possible.

The issue was also fixed in release 2.3.1 of the 2.x branch, although it is generally not recommended to run this branch since it depends on an outdated TYPO3 version.

References TYPO3 Security Advisory TYPO3-EXT-SA-2020-015 jQuery Security Advisory GHSA-gxr4-xjj5-5px2 Open Bug Bounty Report OBB-1219978

Contact If you have any questions or comments about this advisory: Open an issue Email us at security@kitodo.org