Three Learning Koollab 5.3.2 Assessment Reinforcement Endpoint unserialize sql injection

Summaryinfo

A vulnerability was found in Three Learning Koollab 5.3.2 and classified as critical. Affected by this issue is the function unserialize of the component Assessment Reinforcement Endpoint. The manipulation results in sql injection. This vulnerability is identified as CVE-2026-63232. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Three Learning Koollab 5.3.2. Affected is the function unserialize of the component Assessment Reinforcement Endpoint. The manipulation with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticated attacker to inject through the assessment reinforcement endpoint, control data passed to unserialize(), write a webshell to a publicly accessible location, and execute arbitrary code on the server.

The advisory is available at csa.gov.sg. This vulnerability is traded as CVE-2026-63232 since 07/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/29/2026). This vulnerability is assigned to T1505 by the MITRE ATT&CK project.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Three Learning

Name

• Koollab

Version

• 5.3.2

CPE 2.3info

• 🔒

CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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