CVE-2021-20185
Moodle Client side denial of service via personal message
5.3
MEDIUM
CVSS 3.1
EPSS 0.38%
Description
It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that messaging did not impose a character limit when sending messages, which could result in client-side (browser) denial of service for users receiving very large messages.
How to fix CVE-2021-20185
To remediate CVE-2021-20185, upgrade the affected package to a fixed version below.
- —upgrade to 3.5.16 or later
- —upgrade to 3.5.16 or later
Is CVE-2021-20185 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 3.5.0, < 3.5.16, >= 3.8.0, < 3.8.7, >= 3.9.0, < 3.9.4, >= 3.10.0, < 3.10.1
- >= 3.5, < 3.5.16
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |