UpHeron
All vulnerabilities

Servers and applications

CVE-2021-20185

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.

Severity
Medium 5.3
Published
28 Jan 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.5.16, 3.8.7, 3.9.4
Sources
NVD

Affected software

SoftwareAffected versions
MoodleServers and applications · cpe:a:moodle:moodle
  • From 3.5.0 before 3.5.16
  • From 3.8.0 before 3.8.7
  • From 3.9.0 before 3.9.4
  • Version 3.10.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-20185
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-20185