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CVE-2020-13675 — Vulnerability in drupal/core — CVE Details

CRITICAL

Unrestricted Upload of File with Dangerous Type in Drupal core

Published February 12, 2022Updated December 10, 2025Source: osv

Summary

Drupal's JSON:API and REST/File modules allow file uploads through their HTTP APIs. The modules do not correctly run all file validation, which causes an access bypass vulnerability. An attacker might be able to upload files that bypass the file validation process implemented by modules on the site.

Advisory Timeline

  • First published February 12, 2022 (1703 days ago).
  • Last revised December 10, 2025 — 1398 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer
Update drupal/core to 8.9.19 or later
composer require "drupal/core:^8.9.19"
Composer
Update drupal/core to 9.2.6 or later
composer require "drupal/core:^9.2.6"
Composer
Update drupal/core to 9.1.13 or later
composer require "drupal/core:^9.1.13"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (3)

Affects 1 ecosystem: packagist (1).

PackageEcosystemAffectedFixed In
drupal/core
packagist
8.0.0, 8.0.1, 8.0.2, 8.0.3 (+159 more)8.9.19
drupal/core
packagist
9.2.0, 9.2.1, 9.2.2, 9.2.3 (+2 more)9.2.6
drupal/core
packagist
9.1.0, 9.1.1, 9.1.10, 9.1.11 (+9 more)9.1.13

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2020-13675?
Unrestricted Upload of File with Dangerous Type in Drupal core This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2020-13675?
CVE-2020-13675 affects drupal/core. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-13675 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-v8wr-r69p-mmwx
BIT-drupal-2020-13675
DRUPAL-CONTRIB-2021-029
DRUPAL-CORE-2021-008

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