CVE-2020-13664 — Vulnerability in drupal/core — CVE Details

HIGH

Drupal Core Arbitrary PHP code execution vulnerability

Published May 24, 2022Updated December 10, 2025Source: osv

Summary

Arbitrary PHP code execution vulnerability in Drupal Core under certain circumstances. An attacker could trick an administrator into visiting a malicious site that could result in creating a carefully named directory on the file system. With this directory in place, an attacker could attempt to brute force a remote code execution vulnerability. Windows servers are most likely to be affected. This issue affects: Drupal Drupal Core 8.8.x versions prior to 8.8.8; 8.9.x versions prior to 8.9.1; 9.0.1 versions prior to 9.0.1.

Advisory Timeline

First published May 24, 2022 (1602 days ago).
Last revised December 10, 2025 — 1296 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer

Update drupal/core to 9.0.1 or later

composer require "drupal/core:^9.0.1"

Composer

Update drupal/drupal to 9.0.1 or later

composer require "drupal/drupal:^9.0.1"

Composer

Update drupal/drupal to 8.9.1 or later

composer require "drupal/drupal:^8.9.1"

Composer

Update drupal/core to 8.9.1 or later

composer require "drupal/core:^8.9.1"

Composer

Update drupal/core to 8.8.8 or later

composer require "drupal/core:^8.8.8"

Composer

Update drupal/drupal to 8.8.8 or later

composer require "drupal/drupal:^8.8.8"

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

Affected Packages (6)

Affects 1 ecosystem: packagist (2).

Package	Ecosystem	Affected	Fixed In
drupal/core	packagist	9.0.0	9.0.1
drupal/drupal	packagist	9.0.0	9.0.1
drupal/drupal	packagist	8.9.0	8.9.1
drupal/core	packagist	8.9.0	8.9.1
drupal/core	packagist	8.8.0, 8.8.1, 8.8.2, 8.8.3 (+4 more)	8.8.8
drupal/drupal	packagist	8.8.0, 8.8.1, 8.8.2, 8.8.3 (+4 more)	8.8.8

Vulnerability Classification

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

CWE-77
View on MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

References

Frequently Asked Questions

What is CVE-2020-13664?: Drupal Core Arbitrary PHP code execution vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2020-13664?: CVE-2020-13664 affects drupal/core and drupal/drupal. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-13664 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-x72f-ggjw-v5xh

BIT-drupal-2020-13664

DRUPAL-CORE-2020-005

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