What is CVE-2021-40694?

CVE-2021-40694 is a medium-severity vulnerability in Moodle, classified under Improper Encoding or Escaping of Output. CVSS score: 4.9/10. Published 2022-09-29.

How severe is CVE-2021-40694?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Is CVE-2021-40694 known to be exploited?

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

Vulnerability in Moodle

CVE-2021-40694

Insufficient escaping of the LaTeX preamble made it possible for site administrators to read files available to the HTTP server system account.

EPSS: 0.009 (56.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Moodle
N/a Moodle — versions 3.11 to 3.11.2, 3.10 to 3.10.6, 3.9 to 3.9.9 and earlier unsupported versions

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

Public proof-of-concept exploits

jev770/badmoodle-scan

References

secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-40694?: CVE-2021-40694 is a medium-severity vulnerability in Moodle, classified under Improper Encoding or Escaping of Output. CVSS score: 4.9/10. Published 2022-09-29.
How severe is CVE-2021-40694?: Medium severity. CVSS v3 base score is 4.9 out of 10.
Is CVE-2021-40694 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.