Home/CVE/Cross-site scripting vulnerability in Drupal Core. Drupal AJAX API does not disable JSONP by default, allowing for an XS
CVE

CVE-2020-13666

Cross-site scripting vulnerability in Drupal Core. Drupal AJAX API does not disable JSONP by default, allowing for an XS

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 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.

MEDIUM · CVSS 6.1 EPSS 0.00509
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

4
drupal>= 7.0 and < 7.73
drupal>= 8.8.0 and < 8.8.10
drupal>= 8.9.0 and < 8.9.6
drupal>= 9.0.0 and < 9.0.6
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Packagist drupal/core MEDIUM fixed in 8.8.10
Packagist drupal/drupal MEDIUM fixed in 7.73
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · mlhess@drupal.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 May 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.drupal.org/sa-core-2020-007Vendor Advisory
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