Critical severity · published May 5, 2021
CVE-2020-13665
Access bypass vulnerability in Drupal Core allows JSON:API when JSON:API is in read/write mode
9.8
CVSS
1.3%
EPSS
No
On KEV
Description
Access bypass vulnerability in Drupal Core allows JSON:API when JSON:API is in read/write mode. Only sites that have the read_only set to FALSE under jsonapi.settings config are vulnerable. 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.x versions prior to 9.0.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DR
Drupal · Drupal
8.8.0 before 8.8.8; 8.9.0 before 8.9.1; 9.0.0 before 9.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-13665
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-13665
Vendor Advisory
https://www.drupal.org/sa-core-2020-006
More from Drupal
9.8
CVE-2026-9082
Drupal core - Highly critical - SQL injection - SA-CORE-2026-004
9.8
CVE-2018-7602
Drupal core - Highly critical - Remote Code Execution - SA-CORE-2018-004
9.8
CVE-2018-7600
Drupal Core Remote Code Execution Vulnerability
8.8
CVE-2020-13671
Drupal core Un-restricted Upload of File
8.1
CVE-2019-6340
Drupal core - Highly critical - Remote Code Execution