VULNERABILITY INTELLIGENCE
CVE-2026-79670
CVSS score4.8 MEDIUM
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-08-25
Last modified2026-08-31
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
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.
Weakness classification
- disclosure@vulncheck.com: CWE-434