Description

Drupal Core is prone to multiple cross-site scripting vulnerabilities because it fails to properly sanitize user-supplied input. An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. Drupal Core versions 8.x.x ranging from 8.0.0 and up to and including 8.7.14 are vulnerable.

Remediation

Update to Drupal Core version 8.8.10 or latest

References

https://www.checkmarx.com/blog/drupal-core-behind-the-vulnerability-part-2-defacement-stored-xss-and-self-xss/

https://www.drupal.org/sa-core-2020-007

https://www.drupal.org/sa-core-2020-009

https://www.drupal.org/sa-core-2020-010

Related Vulnerabilities

Envoy Proxy Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') Vulnerability (CVE-2023-27493)

Jenkins Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability (CVE-2021-21615)

Rukovoditel Unrestricted Upload of File with Dangerous Type Vulnerability (CVE-2020-11815)

Lighttpd Missing Release of Memory after Effective Lifetime Vulnerability (CVE-2022-41556)

Moodle Permissions, Privileges, and Access Controls Vulnerability (CVE-2014-0009)

Severity

High

Classification

CVE-2020-13666 CVE-2020-13668 CVE-2020-13669 CVE-2020-13688 CWE-79 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Tags

Missing Update XSS