CVE-2026-54733

Katalog CVE

CVSS 9.3 · Critical EPSS 0,88%

Kerentanan Improper Verification of Cryptographic Signature. Skor CVSS 4.0 9.3 (Critical) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

16 Juli 2026

Terakhir diubah

16 Juli 2026

Status NVD

Awaiting Analysis

CVSS 4.0

9.3 (Critical), sumber github.com
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-347: Improper Verification of Cryptographic Signature

EPSS (30 hari)

0,88% peluang dieksploitasi; lebih tinggi dari 57,8% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/microsoft/o365-moodle/commit/01b2d4c2e13b06a66557527084cbf9bace655944
• https://github.com/microsoft/o365-moodle/commit/258872f6e2011f4efa8ebb77d2898142a9435e89
• https://github.com/microsoft/o365-moodle/commit/d5596655f0baaee0f11aec2e10d6f36b0bd29220
• https://github.com/microsoft/o365-moodle/releases/tag/v20260423_m405
• https://github.com/microsoft/o365-moodle/releases/tag/v20260423_m500
• https://github.com/microsoft/o365-moodle/releases/tag/v20260423_m501
• https://github.com/microsoft/o365-moodle/security/advisories/GHSA-hqjh-93qv-47v5