YesWiki up to 4.6.x BazarListeAction template path traversal

Summaryinfo

A vulnerability was found in YesWiki up to 4.6.x. It has been rated as problematic. This impacts the function BazarListeAction. The manipulation of the argument template leads to path traversal. This vulnerability is uniquely identified as CVE-2026-116822. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in YesWiki up to 4.6.x. This issue affects the function BazarListeAction. The manipulation of the argument template with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity. The summary by CVE is:

YesWiki before 4.7.0 contains a path traversal vulnerability in BazarListeAction that allows unauthenticated attackers to select arbitrary templates within the @bazar Twig namespace via the template GET parameter. Attackers can append crafted template values to pages containing the bazarliste action to force unintended layouts, causing page defacement for visitors following the crafted link.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-116822 since 10/26/2026. 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. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 4.7.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-110529). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Content Management System

Name

• YesWiki

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6

Website

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

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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