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Advisories

Ech0 before 4.4.3 Stored XSS via SVG Upload

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severity
medium
date
Affecting

  • Ech0 >= 0, < 4.4.3

CWE
  • CWE-434 Unrestricted Upload of File with Dangerous Type
CVSS
4.8
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Credit
offset
Description
Ech0 before 4.4.3 contains a stored cross-site scripting vulnerability in the file upload endpoint that validates Content-Type using only client-supplied headers without server-side inspection. Attackers with admin privileges can upload SVG or HTML files containing JavaScript that executes in the application origin when accessed by any user, enabling session hijacking and data exfiltration.

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