CyberRota Analysis
AI-GeneratedVersions of Kirby prior to 4.9.1 and 5.4.1 are vulnerable to cross-site scripting (XSS) due to inadequate server-side sanitization of the list field's HTML content, allowing attackers to inject malicious scripts directly via the API. This vulnerability can lead to persistent XSS, affecting both site visitors and logged-in users by executing harmful scripts in their browsers. Organizations using affected versions of Kirby should prioritize upgrading to the patched versions to mitigate this security risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
Kirby is an open-source content management system. In versions prior to 4.9.1 and 5.4.1, Kirby did not securely sanitize the contents of the list field on save, leaving it vulnerable to cross-site scripting (XSS). Kirby's list field stores its formatted content as HTML, and unlike other field types, its HTML special characters cannot be escaped without losing the formatting. Sanitization was only enforced client-side in the Panel, while the server did not sanitize the content on save. As a result, an attacker could bypass the Panel and send malicious HTML directly to Kirby's API, storing unsanitized markup in the content file. That markup would then be rendered on the site frontend and executed in the browsers of site visitors and logged-in users browsing the site, resulting in persistent XSS. This issue has been fixed in versions 4.9.1 and 5.4.1.