Improper Encoding or Escaping of Output Affecting yeswiki/yeswiki package, versions <4.5.4
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-YESWIKIYESWIKI-10245156
- published25 May 2025
- disclosed29 Apr 2025
- creditpizza-power
Introduced: 29 Apr 2025
CVE-2025-46347 (opens in a new tab)How to fix?
Upgrade yeswiki/yeswiki to version 4.5.4 or higher.
Overview
Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output through the addCustomCSSPreset method in the ApiController.php file. An attacker can execute arbitrary code on the server by modifying the file extension to .php and injecting PHP code into the file content parameters during a POST request.
Note: This is only exploitable if the server configuration allows PHP execution in user-writable directories.