CVE-2025-46347: yeswiki Improper Encoding

Description

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.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-116 CWE-116

Affected Products

Vendor	Product	Versions
yeswiki	yeswiki	< 4.5.4

References

Advisories & Patches

https://github.com/YesWiki/yeswiki/commit/8fe5275a78dc7e0f9c242baa3cbac6b5ac1cc066 https://github.com/YesWiki/yeswiki/security/advisories/GHSA-88xg-v53p-fpvf https://github.com/YesWiki/yeswiki/security/advisories/GHSA-88xg-v53p-fpvf

Exploits

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-88xg-v53p-fpvf https://github.com/YesWiki/yeswiki/security/advisories/GHSA-88xg-v53p-fpvf

Frequently Asked Questions

What is CVE-2025-46347? +

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 has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-46347? +

CVE-2025-46347 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-46347? +

CVE-2025-46347 affects products from yeswiki, specifically: yeswiki. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-46347? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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