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Advisories

Ech0 before 4.7.3 Access Token Revocation Bypass

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severity
high
date
Affecting

  • Ech0 >= 0, < 4.7.3

CWE
  • CWE-613 Insufficient Session Expiration
CVSS
9.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
adrgs, aisafe-bot
Description
Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero, and admin delete does not blacklist the JTI, leaving stolen tokens cryptographically valid until JWT secret rotation.

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