ibexa fieldtype-richtext up to 4.6.9 Blocklist Link cross site scripting

Summaryinfo

A vulnerability has been found in ibexa fieldtype-richtext up to 4.6.9 and classified as problematic. Affected is an unknown function of the component Blocklist Link Handler. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2024-43369. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in ibexa fieldtype-richtext up to 4.6.9. It has been rated as problematic. This issue affects an unknown part of the component Blocklist Link Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Ibexa RichText Field Type is a Field Type for supporting rich formatted text stored in a structured XML format. In versions on the 4.6 branch prior to 4.6.10, the validator for the RichText fieldtype blocklists `javascript:` and `vbscript:` in links to prevent XSS. This can leave other options open, and the check can be circumvented using upper case. Content editing permissions for RichText content is required to exploit this vulnerability, which typically means Editor role or higher. The fix implements an allowlist instead, which allows only approved link protocols. The new check is case insensitive. Version 4.6.10 contains a patch for this issue. No known workarounds are available.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2024-43369 since 08/09/2024. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 4.6.10 eliminates this vulnerability. Applying the patch 0a3b830e8806d5169f697351fdc48ffd95a25c67 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• ibexa

Name

• fieldtype-richtext

Version

• 4.6.0
• 4.6.1
• 4.6.2
• 4.6.3
• 4.6.4
• 4.6.5
• 4.6.6
• 4.6.7
• 4.6.8
• 4.6.9

License

• open-source

Website

• Product: https://github.com/ibexa/fieldtype-richtext/

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