CVEvulnerability

CVE-2020-13671

8.8 HIGH Known exploited Published 2020-11-20 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Drupal core Un-restricted Upload of File — Drupal Drupal core

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

Added to KEV
2022-01-18
Remediation due
2022-07-18
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2020-13671
Status
Analyzed
Published
2020-11-20
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.5 MEDIUM — AV:N/AC:L/Au:S/C:P/I:P/A:P
Weaknesses
CWE-434

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.

Affected configurations

• drupal drupal (>= 7.0 < 7.74) • drupal drupal (>= 8.8.0 < 8.8.11) • drupal drupal (>= 8.9.0 < 8.9.9) • drupal drupal (>= 9.0.0 < 9.0.8) • fedoraproject fedora 32 • fedoraproject fedora 33

Related

Weakness · CWE (1)

  • CWE-434 Unrestricted Upload of File with Dangerous Type weakness

References