Three Learning Koollab LMS 5.3.2 improper authentication

Summaryinfo

A vulnerability marked as critical has been reported in Three Learning Koollab LMS 5.3.2. This affects an unknown function. This manipulation causes improper authentication. This vulnerability appears as CVE-2026-63237. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Three Learning Koollab LMS 5.3.2. It has been declared as critical. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at csa.gov.sg. This vulnerability is known as CVE-2026-63237 since 07/16/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/29/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Three Learning

Name

• Koollab LMS

Version

• 5.3.2

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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