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CVE-2020-13666

Drupal Core Cross-site scripting vulnerability

6.1 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

2.93%Up 2.5 points since May 6, 2021
90%50%10%1%

What each source reports

NVD Score used 6.1

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.

Record
CVE-2020-13666
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-79
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2020-13666
Updated
2026-11-02
EUVDEUVD-2022-3195 No score

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.

Record
EUVD-2022-3195
Updated
2026-11-03
GitHub AdvisoriesGHSA-8jj2-x2gc-ggm7 6.1

Drupal Core Cross-site scripting vulnerability

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.

Record
GHSA-8jj2-x2gc-ggm7
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVALPINE-CVE-2020-13666 6.1

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.

Record
ALPINE-CVE-2020-13666
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-03
OSV 6.1

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.

Record
CVE-2020-13666
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
Show 4 moreShow less
OSVGHSA-8jj2-x2gc-ggm7 6.1

Drupal Core Cross-site scripting vulnerability

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.

Record
GHSA-8jj2-x2gc-ggm7
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVUBUNTU-CVE-2020-13666 6.1

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.

Record
UBUNTU-CVE-2020-13666
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVBIT-drupal-2020-13666 No score

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.

Record
BIT-drupal-2020-13666
Updated
2026-11-02
OSVDRUPAL-CORE-2020-007 No score

The Drupal AJAX API does not disable JSONP by default, which can lead to cross-site scripting.

Record
DRUPAL-CORE-2020-007
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
drupal/core
Packagist
 8.8.0 up to 8.8.10
8.8.10
drupal/core
Packagist
 8.9.0 up to 8.9.6
8.9.6
drupal/core
Packagist
 9.0.0 up to 9.0.6
9.0.6
drupal/core
Packagist
 7.0.0 up to 7.73
7.73
drupal/drupal
Packagist
 7.0.0 up to 7.73
7.73
drupal/drupal
Packagist
 8.8.0 up to 8.8.10
8.8.10
drupal/drupal
Packagist
 8.9.0 up to 8.9.6
8.9.6
drupal/drupal
Packagist
 9.0.0 up to 9.0.6
9.0.6
drupal7
Alpine:v3.11
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.12
 before 7.73-r0
7.73-r0
Show 19 moreShow less
Affected packages
PackageAffectedFixed
drupal7
Alpine:v3.13
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.14
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.15
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.16
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.17
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.18
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.19
 before 7.73-r0
7.73-r0
drupal7
Alpine:v3.20
 before 7.73-r0
7.73-r0
drupal
Bitnami
 7.0.0 up to 7.73.0, 8.8.0 up to 8.8.10, 8.9.0 up to 8.9.6, 9.0.0 up to 9.0.6
7.73.08.8.108.9.69.0.6
drupal7
Debian:9
From an advisory covering 2 CVEs
 before 7.52-2+deb9u12, plus listed versions
7.52-27.52-2+deb9u17.52-2+deb9u107.52-2+deb9u117.52-2+deb9u2
Show 7 moreShow less
7.52-2+deb9u37.52-2+deb9u47.52-2+deb9u57.52-2+deb9u67.52-2+deb9u77.52-2+deb9u87.52-2+deb9u9
7.52-2+deb9u12
drupal/core
Packagist
 8.0.0 up to 8.8.10, 8.9.0 up to 8.9.6, 9.0.0 up to 9.0.6, plus listed versions
8.0.18.0.28.0.38.0.48.0.5
Show 45 moreShow less
8.0.68.1.08.1.0-beta18.1.0-beta28.1.0-rc18.1.18.1.108.1.28.1.38.1.48.1.58.1.68.1.78.1.88.1.98.2.08.2.0-beta18.2.0-beta28.2.0-beta38.2.0-rc18.2.0-rc28.2.18.2.28.2.38.2.48.2.58.2.68.2.78.2.88.3.08.3.0-alpha18.3.0-beta18.3.0-rc18.3.0-rc28.3.18.3.28.3.38.3.48.3.58.3.68.3.78.3.88.3.98.4.08.4.0-alpha1
8.8.108.9.69.0.6
drupal/core
Packagist
 8.8.0 up to 8.8.10, plus listed versions
8.8.18.8.28.8.38.8.48.8.5
Show 4 moreShow less
8.8.68.8.78.8.88.8.9
8.8.10
drupal/core
Packagist
 8.9.0 up to 8.9.6, plus listed versions
8.9.18.9.28.9.38.9.48.9.5
8.9.6
drupal/core
Packagist
 9.0.0 up to 9.0.6, plus listed versions
9.0.19.0.29.0.39.0.49.0.5
9.0.6
drupal/drupal
Packagist
 8.8.0 up to 8.8.10, plus listed versions
8.8.18.8.28.8.38.8.48.8.5
Show 4 moreShow less
8.8.68.8.78.8.88.8.9
8.8.10
drupal/drupal
Packagist
 8.9.0 up to 8.9.6, plus listed versions
8.9.18.9.28.9.38.9.48.9.5
8.9.6
drupal/drupal
Packagist
 9.0.0 up to 9.0.6, plus listed versions
9.0.19.0.29.0.39.0.49.0.5
9.0.6
drupal7
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
7.23-17.24-17.24-27.26-17.26-1ubuntu0.17.26-1ubuntu0.1+esm17.26-1ubuntu0.1+esm27.26-1ubuntu0.1+esm3
 None known
drupal7
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
7.38-17.41-17.44-1ubuntu1~16.04.07.44-1ubuntu1~16.04.0+esm17.44-1ubuntu1~16.04.0+esm27.44-1ubuntu1~16.04.0+esm3
 None known

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-13666 is a medium vulnerability (CVSS 6.1) in Drupal, published September 16, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.93%, the 87th percentile. Fixed in drupal/core 8.8.10.

References

Show 4 moreShow less
This page doesn't list everything

Left out here: 96 versions. The JSON record has them.

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