XWiki Rendering XHTML Rendering HTML injection

Summaryinfo

A vulnerability labeled as problematic has been found in XWiki Rendering. This issue affects some unknown processing of the component XHTML Rendering. The manipulation results in HTML injection. This vulnerability is identified as CVE-2023-37908. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in XWiki Rendering (Content Management System) (the affected version unknown). It has been classified as problematic. Affected is an unknown part of the component XHTML Rendering. The manipulation with an unknown input leads to a html injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

XWiki Rendering is a generic Rendering system that converts textual input in a given syntax into another syntax. The cleaning of attributes during XHTML rendering, introduced in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid attribute names. This can be exploited, e.g., via the link syntax in any content that supports XWiki syntax like comments in XWiki. When a user moves the mouse over a malicious link, the malicious JavaScript code is executed in the context of the user session. When this user is a privileged user who has programming rights, this allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance. While this attribute was correctly recognized as not allowed, the attribute was still printed with a prefix `data-xwiki-translated-attribute-` without further cleaning or validation. This problem has been patched in XWiki 14.10.4 and 15.0 RC1 by removing characters not allowed in data attributes and then validating the cleaned attribute again. There are no known workarounds apart from upgrading to a version including the fix.

The weakness was released 10/25/2023 as GHSA-663w-2xp3-5739. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-37908 since 07/10/2023. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading eliminates this vulnerability. Applying the patch f4d5acac451dccaf276e69f0b49b72221eef5d2f 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

Type

• Content Management System

Vendor

• XWiki

Name

• Rendering

License

• open-source

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CPE 2.2info

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