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CVE-2026-55087

🗓️ 19 Aug 2026 19:29:16Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 82 Views🌐 WEB

Etherpad 2.1.0-3.0.0 reflects unsanitized x-proxy-path into admin pages causing cache-poisoning XSS and open redirect; fixed in 3.1.0.

Related
Detection
Affected
Refs
Paths
Vulners
Node
etherpadetherpadRange2.1.0–3.1.0
[
  {
    "vendor": "ether",
    "product": "etherpad",
    "versions": [
      {
        "version": ">= 2.1.0, < 3.1.0",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
x-proxy-pathheader/adminThe x-proxy-path request header is used to substitute paths into HTML, JavaScript, and CSS without proper sanitization, potentially leading to script injection if a shared proxy caches the response.CWE-444, CWE-601, CWE-79
x-proxy-pathheader/p/:pad/timesliderThe x-proxy-path request header can be used to inject a protocol-relative value, leading to an open redirect to an attacker-controlled host.CWE-444, CWE-601, CWE-79

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09 Sep 2026 21:15Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.16.1
EPSS0.00578
SSVC
82