YesWiki up to 4.6.6 pointimage.php pointimage pagetag/title/description cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in YesWiki up to 4.6.6. Affected by this vulnerability is the function pointimage of the file tools/attach/actions/pointimage.php. The manipulation of the argument pagetag/title/description results in cross site scripting. This vulnerability is cataloged as CVE-2026-104450. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in YesWiki up to 4.6.6. Affected is the function pointimage of the file tools/attach/actions/pointimage.php. The manipulation of the argument pagetag/title/description with an unknown input leads to a cross site scripting 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:

YesWiki before 4.6.7 contains a missing authorization flaw in the pointimage action (tools/attach/actions/pointimage.php), which saves content to an attacker-chosen page with write ACL checks bypassed. Unauthenticated attackers can POST pagetag, title, and description fields to any page rendering {{pointimage}} to append raw HTML or JavaScript to any wiki page, including pages whose write ACL restricts editing, causing stored cross-site scripting in viewers' and administrators' browsers.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-104450 since 10/02/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

By approaching the search of inurl:tools/attach/actions/pointimage.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 4.6.7 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Name

• YesWiki

Version

• 4.6.0
• 4.6.1
• 4.6.2
• 4.6.3
• 4.6.4
• 4.6.5
• 4.6.6

Website

• Product: https://github.com/YesWiki/yeswiki/

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