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Vulnerability details: VCID-1uje-p9f2-vfh2
Vulnerability ID VCID-1uje-p9f2-vfh2
Aliases CVE-2020-13666
GHSA-8jj2-x2gc-ggm7
Summary Cross-site scripting vulnerability in Drupal Core. Drupal AJAX API does not disable JSONP by default, allowing for an XSS attack. This issue affects: Drupal Drupal Core 7.x versions prior to 7.73; 8.8.x versions prior to 8.8.10; 8.9.x versions prior to 8.9.6; 9.0.x versions prior to 9.0.6.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
epss 0.00336 https://api.first.org/data/v1/epss?cve=CVE-2020-13666
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-8jj2-x2gc-ggm7
cvssv3.1 6.1 https://github.com/drupal/core
generic_textual MODERATE https://github.com/drupal/core
cvssv3.1 6.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13666.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13666.yaml
cvssv3.1 6.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13666.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13666.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2020-13666
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2020-13666
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2020-13666
cvssv3.1 6.1 https://www.drupal.org/sa-core-2020-007
generic_textual MODERATE https://www.drupal.org/sa-core-2020-007
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-13666
https://github.com/drupal/core
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13666.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13666.yaml
https://nvd.nist.gov/vuln/detail/CVE-2020-13666
https://www.drupal.org/sa-core-2020-007
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-8jj2-x2gc-ggm7 https://github.com/advisories/GHSA-8jj2-x2gc-ggm7
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N 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:C/C:L/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13666.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:C/C:L/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13666.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:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-13666
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:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-13666
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:C/C:L/I:L/A:N Found at https://www.drupal.org/sa-core-2020-007
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 0.55857
EPSS Score 0.00336
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:42:07.102223+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.11/community.json 37.0.0