Is CVE-2020-13671 in the CISA KEV catalog?

Yes. CVE-2020-13671 is on the CISA Known Exploited Vulnerabilities list, added 2022-01-18.

What is the CVSS severity of CVE-2020-13671?

CVE-2020-13671 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2020-13671?

CVE-2020-13671 has an EPSS score of 4.27% (90th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2020-13671

HIGHCISA KEVEPSS 90th pctl

8.8

CVSS v3

NVD

Description

Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.

CWE-434Unrestricted File Upload

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.27%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Drupal core Un-restricted Upload of File

Improper sanitization in the extension file names is present in Drupal core.

Apply updates per vendor instructions.

Remediation due: 2022-07-18

References

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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 2025-11-03.