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CVE-2026-63237 is a two-factor authentication bypass vulnerability in Koollab LMS 5.3.2 affecting the TOTP validation flow. The flaw allows an attacker to provide a client-controlled TOTP seed and then generate a matching one-time password from that attacker-supplied seed, rather than having the application validate the code against a server-trusted secret bound to the target account. As a result, the second authentication factor can be bypassed, undermining the integrity of the MFA process and enabling unauthorized access when the attacker can reach the affected authentication workflow.
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No public exploit code observed for this vulnerability.
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Cross-references every affected SKU, including bundled OEM variants.
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