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CVE-2021-20185

MEDIUMCVSS 5.3/10EPSS 1.38%

Last modified

CVE-2021-20185 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 1.38% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
5.3/10

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

EPSS Probability
1.38%

68.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MoodleMoodle>= 3.5.0, < 3.5.16
MoodleMoodle>= 3.8.0, < 3.8.7
MoodleMoodle>= 3.9.0, < 3.9.4
MoodleMoodle3.10.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2021-20185?
CVE-2021-20185 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20185?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20185?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST