PT-2026-81289 · Ech0 · Ech0
CVSS v4.0
4.8
Medium
| Vector | AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N |
Name of the Vulnerable Software and Affected Versions
Ech0 versions prior to 4.4.3
Description
A stored cross-site scripting issue exists in the file upload endpoint. The application validates the
Content-Type using only client-supplied headers without performing server-side inspection. This allows attackers with admin privileges to upload SVG or HTML files containing JavaScript. When these files are accessed by any user, the script executes within the application origin, which can lead to session hijacking and data exfiltration.Recommendations
Update to version 4.4.3 or later.
Exploit
Fix
Unrestricted File Upload
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Weakness Enumeration
Related Identifiers
Affected Products
Ech0