CVE-2026-79667

Summary

Ech0 version 4.3.4 and earlier fails to reliably enforce scoped access token (least-privilege) restrictions on several privileged admin routes. Multiple privileged endpoints (e.g., /api/inbox, /api/panel/comments, /api/backup/export) omit scope checks and authorize based only on the user's admin role, and the backup export handler discards token scope metadata entirely. An attacker holding a deliberately limited (low-scope) admin access token can reach broader privileged functionality than intended, including reading the inbox and exporting a full database backup ZIP archive. Fixed in 4.4.3.

Affected Software

Weaknesses

• CWE-285: Improper Authorization

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/lin-snow/Ech0/security/advisories/GHSA-4h9q-p5j4-xvvh

References

• https://github.com/lin-snow/Ech0/security/advisories/GHSA-4h9q-p5j4-xvvh
• https://www.vulncheck.com/advisories/ech0-before-authentication-bypass-via-scope-enforcement

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