CyberRota Analysis
AI-GeneratedEtherpad versions 2.1.0 to 3.1.0 are vulnerable due to improper handling of the x-proxy-path request header, which can lead to the injection of malicious scripts into responses served to administrators and potential redirection to attacker-controlled hosts. The impact includes the risk of executing unauthorized scripts and compromising administrative access, particularly in environments using shared proxies or CDNs. Organizations using affected versions should prioritize upgrading to version 3.1.0 to mitigate these risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad uses the attacker-controlled x-proxy-path request header in src/node/hooks/express/admin.ts when substituting paths into HTML, JavaScript, and CSS under /admin without sanitization, Vary: x-proxy-path, or Cache-Control: private, no-store. A shared proxy or CDN can cache the resulting response and serve attacker-injected script to an administrator. In src/node/hooks/express/specialpages.ts, version 3.0.0 also accepts a protocol-relative x-proxy-path value when constructing the /p/:pad/timeslider redirect, allowing redirection to an attacker-controlled host. The issues are exploitable when the deployment permits client-supplied x-proxy-path headers to reach Etherpad. This issue is fixed in version 3.1.0.