CVE-2021-20185

MEDIUM

Moodle < 3.5.16 - Denial of Service via Large Message

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://moodle.org/mod/forum/discuss.php?d=417168

Scores

CVSS v3 5.3
EPSS 0.0038
EPSS Percentile 59.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Details

CWE
CWE-770 CWE-400
Status published
Products (3)
moodle/moodle 3.10.0
moodle/moodle 3.5 - 3.5.16Packagist
moodle/moodle 3.5.0 - 3.5.16
Published Jan 28, 2021
Tracked Since Feb 18, 2026