A vulnerability was found in XWiki Platform (Content Management System). It has been classified as problematic. Affected is an unknown part of the component XAR Import Handler. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. This is going to have an impact on confidentiality. CVE summarizes:

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions any user with edit rights on a document can trigger an XAR import on a forged XAR file, leading to the ability to display the content of any file on the XWiki server host. This vulnerability has been patched in XWiki 13.10.11, 14.4.7 and 14.10-rc-1. Users are advised to upgrade. Users unable to upgrade may apply the patch `e3527b98fd` manually.

The weakness was published 03/08/2023 as GHSA-gx4f-976g-7g6v. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-27480 since 03/01/2023. There are neither technical details nor an exploit publicly available.

Upgrading to version 13.10.11, 14.4.7 or 14.10-rc-1 eliminates this vulnerability. Applying the patch e3527b98fdd8dc8179c24dc55e662b2c55199434 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.

Similar entries are available at VDB-214153, VDB-214164, VDB-222239 and VDB-222240.

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• Content Management System

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• XWiki Platform

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• open-source

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