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    CVE-2026-63237

    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.

    Published:Jul 29, 2026
    Last Modified:Jul 29, 2026
    EPS:Jul 29, 2026
    EPSS Score:0.00182
    CVSS Score:4.8

    Affected Products

    Vendor
    Three Learning
    Product
    Koollab Lms

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

    Related CVEs

    CVE-2026-63242 (CVSS 4.3) — A business logic vulnerability in Koollab LMS allowed an authenticated learner to set their lesson completion …
    CVE-2026-63241 (CVSS 3.1) — An insecure direct object reference vulnerability in Koollab LMS allowed an authenticated user to query the co…
    CVE-2026-63240 (CVSS 4.3) — An information disclosure vulnerability in Koollab LMS allowed an authenticated learner to obtain correct quiz…
    CVE-2026-63239 (CVSS 5.4) — A hard-coded AWS IAM credentials vulnerability in Koollab LMS allowed an attacker to access shared multi-tenan…
    CVE-2026-63238 (CVSS 6.5) — An authentication bypass vulnerability in Koollab LMS allowed an unauthenticated attacker to take over any acc…
    CVE-2026-63236 (CVSS 3.7) — An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to read another us…
    CVE-2026-63235 (CVSS 3.7) — An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to forcibly termin…
    CVE-2026-63234 (CVSS 9.9) — A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticated attacker to i…
    CVE-2026-63233 (CVSS 9.9) — A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticated attacker to i…
    CVE-2026-63232 (CVSS 9.9) — A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticated attacker to i…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High