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Jwt Attack CVE-2026-63237

| EUVDEUVD-2026-50132 MEDIUM
Improper Verification of Cryptographic Signature (CWE-347)
2026-07-29 CSA GHSA-8j44-5653-q846
4.8
CVSS 3.1 · Vendor: CSA
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Severity by source

Vendor (CSA) PRIMARY
4.8 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Primary rating from Vendor (CSA) · only source for this CVE.

CVSS VectorVendor: CSA

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Jul 29, 2026 - 07:04 vuln.today

DescriptionCVE.org

A TOTP two-factor authentication bypass vulnerability in Koollab LMS allowed an attacker to supply a client-controlled seed to generate a matching one-time password and bypass the second authentication factor, potentially enabling unauthorised access to administrator accounts.

AnalysisAI

Two-factor authentication bypass in Koollab LMS allows attackers to supply a client-controlled TOTP seed and generate a valid one-time password, bypassing the second authentication factor. This can lead to unauthorized access to administrator accounts if TOTP is enabled. No public exploit or active exploitation has been identified at time of analysis.

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CVE-2026-63237 vulnerability details – vuln.today

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