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Vulnerabilities

Vulnerability · CVE-2021-40693

An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

Published Sep 29, 2022 · catalog updated Jun 17, 2026 · An authentication bypass risk

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-40693. EPSS is 0.80%. Act only if a listed version of An authentication bypass risk is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (An authentication bypass risk).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.80%
Remediation
Version ranges on file
Affected products
cpe moodle/moodle

An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe moodle/moodle< 3.10.7
  • cpe moodle/moodle< 3.11.3
  • cpe moodle/moodle< 3.9.10

How to fix CVE-2021-40693

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-40693. EPSS is 0.80%. Act only if a listed version of An authentication bypass risk is installed.

Which versions are affected?

Compare what you have installed with < 3.10.7, < 3.11.3, < 3.9.10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-287: Improper Authentication. EPSS 0.80%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Moodle security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 29, 2022 · Monitored products — high

    Detected

    An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

Sources

  • CVE.orgVulnerability recordCVE-2021-40693

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2021-40693

    An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — highNov 4, 2026