Cyber Resilience

CVE-2021-40694

Medium

Published: 29 September 2022

Published
29 September 2022
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0049 66.1th percentile
Risk Priority 10 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-40694 is a medium-severity Improper Encoding or Escaping of Output (CWE-116) vulnerability in Moodle Moodle. Its CVSS base score is 4.9 (Medium).

Operationally, ranked in the top 33.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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

CWE(s)
CWE-116

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

moodle
moodle
≤ 3.9.10 · 3.10.0 — 3.10.7 · 3.11.0 — 3.11.3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-15 Information Output Filtering
addresses: CWE-116

Validating that output matches expected content directly mitigates failures to properly encode or escape data for its destination context.

References