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    2 vulnerabilities found for o365-moodle by microsoft

    CVE-2026-54733 (GCVE-0-2026-54733)

    Vulnerability from nvd – Published: 2026-07-16 14:52 – Updated: 2026-07-16 15:35
    VLAI
    Title
    moodle-local_o365: Authentication bypass via unverified JWT signature in Teams SSO endpoint
    Summary
    The Microsoft 365 and Microsoft Entra ID Plugins for Moodle provide Office 365 and Azure Active Directory integration for Moodle. Prior to 4.5.6, 5.0.5, and 5.1.1, the Microsoft Office 365 Integration plugin local_o365 Teams SSO endpoint sso_login.php base64-decodes a JWT payload and authenticates users from the upn claim without verifying the JWT signature, allowing an unauthenticated attacker to forge a token and obtain a Moodle session as an O365-authenticated user. This issue is fixed in versions 4.5.6, 5.0.5, and 5.1.1.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    microsoft o365-moodle Affected: < 4.5.6
    Affected: >= 5.0.0, < 5.0.5
    Affected: >= 5.1.0, < 5.1.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-54733 (GCVE-0-2026-54733)

    Vulnerability from cvelistv5 – Published: 2026-07-16 14:52 – Updated: 2026-07-16 15:35
    VLAI
    Title
    moodle-local_o365: Authentication bypass via unverified JWT signature in Teams SSO endpoint
    Summary
    The Microsoft 365 and Microsoft Entra ID Plugins for Moodle provide Office 365 and Azure Active Directory integration for Moodle. Prior to 4.5.6, 5.0.5, and 5.1.1, the Microsoft Office 365 Integration plugin local_o365 Teams SSO endpoint sso_login.php base64-decodes a JWT payload and authenticates users from the upn claim without verifying the JWT signature, allowing an unauthenticated attacker to forge a token and obtain a Moodle session as an O365-authenticated user. This issue is fixed in versions 4.5.6, 5.0.5, and 5.1.1.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    microsoft o365-moodle Affected: < 4.5.6
    Affected: >= 5.0.0, < 5.0.5
    Affected: >= 5.1.0, < 5.1.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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