RCE in Moodle

CVE-2021-36394

In Moodle, a remote code execution risk was identified in the Shibboleth authentication plugin.

EPSS: 0.070 (93.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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

References

Frequently asked questions

What is CVE-2021-36394?
CVE-2021-36394 is a critical-severity vulnerability in Moodle, classified under Session Fixation. CVSS score: 9.8/10. Published 2023-03-06.
How severe is CVE-2021-36394?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-36394 known to be exploited?
6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.