What is CVE-2021-36395?

CVE-2021-36395 is a high-severity vulnerability in Moodle, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-03-06.

How severe is CVE-2021-36395?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-36395 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Moodle

CVE-2021-36395

In Moodle, the file repository's URL parsing required additional recursion handling to mitigate the risk of recursion denial of service.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.007 (50.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Moodle
N/a Moodle — versions 3.11, 3.10 to 3.10.4, 3.9 to 3.9.7 and earlier unsupported versions

Weakness classification (CWE)

Public proof-of-concept exploits

jev770/badmoodle-scan

References

patrick@puiterwijk.org (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-36395?: CVE-2021-36395 is a high-severity vulnerability in Moodle, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-03-06.
How severe is CVE-2021-36395?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-36395 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.