Improper access control in Moodle - CVE-2023-5543
Published: October 18, 2023
Vulnerability identifier: #VU82191
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-5543
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to duplicating a BigBlueButton activity assigns the same meeting ID. A remote attacker can bypass implemented security restrictions and gain access to the original meeting.
Affected software
Moodle
How to mitigate CVE-2023-5543
Install updates from vendor's website.
Moodle - addressed in versions 4.0.11, 4.1.6, 4.2.3