yeswiki up to 4.5.3 PHP Extension escape output

Summaryinfo

A vulnerability identified as very critical has been detected in yeswiki up to 4.5.3. This affects an unknown function of the component PHP Extension Handler. Performing a manipulation results in escape output. This vulnerability is reported as CVE-2025-46347. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in yeswiki up to 4.5.3. This affects some unknown functionality of the component PHP Extension Handler. The manipulation with an unknown input leads to a escape output vulnerability. CWE is classifying the issue as CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki vulnerable to remote code execution. An arbitrary file write can be used to write a file with a PHP extension, which then can be browsed to in order to execute arbitrary code on the server, resulting in a full compromise of the server. This could potentially be performed unwittingly by a user. This issue has been patched in version 4.5.4.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-46347 since 04/23/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/29/2025).

Upgrading to version 4.5.4 eliminates this vulnerability. Applying the patch 8fe5275a78dc7e0f9c242baa3cbac6b5ac1cc066 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.

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

Productinfo

Type

• Content Management System

Name

• yeswiki

Version

• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3

License

• open-source

Website

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

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

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

Discussion