CVE-2021-20185

5.3 mediumEPSS 1.4%

Medium (5.3) in moodle moodle. EPSS 1.4% chance of exploitation in the next 30 days.

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

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWEs: CWE-770, CWE-400
Published: 2021-01-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

moodle:moodle

References

https://moodle.org/mod/forum/discuss.php?d=417168
https://moodle.org/mod/forum/discuss.php?d=417168

Check your stack JSON