Unrestricted Character Limit in Moodle Messaging Leads to Denial of Service Vulnerability

Unrestricted Character Limit in Moodle Messaging Leads to Denial of Service Vulnerability

CVE-2021-20185 · MEDIUM Severity

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

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.

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