Is CVE-2021-20187 in the CISA KEV catalog?

No. CVE-2021-20187 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20187?

CVE-2021-20187 has a CVSS v3 base score of 7.2 (HIGH).

What is the EPSS score for CVE-2021-20187?

CVE-2021-20187 has an EPSS score of 1.57% (72th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20187?

Upgrade moodle to 3.9.4 or later.

CVE & CISA-KEV Catalog

CVE-2021-20187

HIGHEPSS 72th pctl

7.2

CVSS v3

NVD

Description

It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that it was possible for site administrators to execute arbitrary PHP scripts via a PHP include used during Shibboleth authentication.

CWE-94Code Injection CWE-829

How to fix

Remediation Available

moodleNVD

Affected:>= 3.9.0, < 3.9.4Fixed in:3.9.4CVE-2021-20187derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.57%probability of exploitation in 30 days

72ndpercentile

Elevated risk: more likely to be exploited than 72% of all known CVEs.

References

Patch1

moodle.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.