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CVE-2026-58271

🗓️ 21 Sep 2026 19:50:14Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 25 Views🌐 WEB

TOTP brute-force in Sync-in Server before 2.4.0 via sync/register endpoint enables MFA removal.

Related
Detection
Affected
Refs
Paths
Vulners
Node
[
  {
    "vendor": "Sync-in",
    "product": "server",
    "versions": [
      {
        "version": "< 2.4.0",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
usernamerequest body/api/app/sync/registerPre-2.4.0, /api/app/sync/register accepts credentials and a TOTP; on failed TOTP the lockout counter is not advanced, allowing brute-force-style attempts to register a client and obtain clientId/clientToken.CWE-307
passwordrequest body/api/app/sync/registerPre-2.4.0, /api/app/sync/register accepts credentials and a TOTP; on failed TOTP the lockout counter is not advanced, allowing brute-force-style attempts to register a client and obtain clientId/clientToken.CWE-307
totprequest body/api/app/sync/registerPre-2.4.0, /api/app/sync/register accepts credentials and a TOTP; on failed TOTP the lockout counter is not advanced, allowing brute-force-style attempts to register a client and obtain clientId/clientToken.CWE-307
clientTokenrequest body/api/app/sync/auth/cookieToken exchange endpoint that can be used to convert a valid clientToken into a full JWT, enabling potential privilege escalation if a token is obtained.CWE-307
Authorizationheader/api/auth/2fa/disableEndpoint that allows disabling MFA, enabling permanent removal of MFA protection.CWE-307

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24 Sep 2026 23:17Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.16.8
EPSS0.00219
SSVC
25