Resource management error in Moodle - CVE-2021-20185
Published: January 25, 2021
Vulnerability identifier: #VU49970
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-20185
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the application does not impose limits on the number of characters sent via messages. A remote user can send an overly long message and perform a client-side (browser) denial of service attack.
Affected software
Moodle
How to mitigate CVE-2021-20185
Install updates from vendor's website.
Moodle - addressed in versions 3.5.16, 3.8.7, 3.9.4, 3.10.1