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Vulnerability details: VCID-3b83-a26k-r3ek
Vulnerability ID VCID-3b83-a26k-r3ek
Aliases CVE-2020-13664
GHSA-x72f-ggjw-v5xh
Summary Drupal Core Arbitrary PHP code execution vulnerability 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.
Status Published
Exploitability 0.5
Weighted Severity 8.4
Risk 4.2
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
epss 0.01317 https://api.first.org/data/v1/epss?cve=CVE-2020-13664
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-x72f-ggjw-v5xh
cvssv3.1 8.8 https://github.com/drupal/core
generic_textual HIGH https://github.com/drupal/core
cvssv3.1 8.8 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13664.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13664.yaml
cvssv3.1 8.8 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13664.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13664.yaml
cvssv2 9.3 https://nvd.nist.gov/vuln/detail/CVE-2020-13664
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2020-13664
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-13664
cvssv3.1 8.8 https://www.drupal.org/sa-core-2020-005
generic_textual HIGH https://www.drupal.org/sa-core-2020-005
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-13664
https://github.com/drupal/core
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13664.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13664.yaml
https://nvd.nist.gov/vuln/detail/CVE-2020-13664
https://www.drupal.org/sa-core-2020-005
cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
GHSA-x72f-ggjw-v5xh https://github.com/advisories/GHSA-x72f-ggjw-v5xh
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/drupal/core
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13664.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13664.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C Found at https://nvd.nist.gov/vuln/detail/CVE-2020-13664
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-13664
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.drupal.org/sa-core-2020-005
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.79011
EPSS Score 0.01317
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:06:55.967447+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-x72f-ggjw-v5xh/GHSA-x72f-ggjw-v5xh.json 37.0.0