CISA KEV · Known exploitedHigh

CVE-2020-13671

Drupal Drupal core

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.

CVSS: 8.8
EPSS: 4.30%
CISA KEV: Listed
Published: 2020.11.21

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability4.30%

Technical severityCVSS 8.8

Vulnerability overview

Affected product and versions

Product: Drupal Drupal core
Affected versions: 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, 7 versions prior to 7.74, >= 7.0 < 7.74, >= 8.8.0 < 8.8.11, >= 8.9.0 < 8.9.9, >= 9.0.0 < 9.0.8, 32, 33
Fixed versions: 7.74, 8.8.11, 8.9.9, 9.0.8

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.07.18

1
Identify
Confirm that Drupal Drupal core and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-434
KEV added: 2022.01.18
Ransomware use: 미확인