YesWiki up to 4.6.5 Archived Revision View handlers/page/show.php Time cross site scripting

Summaryinfo

A vulnerability has been found in YesWiki up to 4.6.5 and classified as problematic. This impacts an unknown function of the file handlers/page/show.php of the component Archived Revision View. This manipulation of the argument Time causes cross site scripting. The identification of this vulnerability is CVE-2026-52773. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in YesWiki up to 4.6.5 and classified as problematic. Affected by this vulnerability is an unknown part of the file handlers/page/show.php of the component Archived Revision View. The manipulation of the argument time with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

YesWiki is a wiki system written in PHP. From version 4.1.0 to before version 4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a hidden HTML input in handlers/page/show.php without escaping. Because MySQL coerces malformed DATETIME strings, an attacker can append HTML or JavaScript to a valid archived revision timestamp, still load that archived revision, and execute arbitrary JavaScript in the victim's browser. The vulnerable form is only rendered when the victim can both read and edit the target page. In restricted deployments this requires a victim with read and write access to that page. On a default doryphore 4.6.5 install, public pages such as PagePrincipale were editable anonymously during validation, so the issue can also affect unauthenticated visitors in that configuration. This issue has been patched in version 4.6.6.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-52773 since 06/08/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

By approaching the search of inurl:handlers/page/show.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 4.6.6 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

Website

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

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