Description
Drupal Core is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to sneak in new line character in headers and pass untrusted values, which would be then improperly parsed. Drupal Core versions ranging from 8.0.0 and up to and including 9.1.15 are vulnerable.
Remediation
Update to Drupal Core version 9.2.16 or latest
References
Related Vulnerabilities
IBM WebSEAL Insufficiently Protected Credentials Vulnerability (CVE-2021-20439)
Varnish Cache Permissions, Privileges, and Access Controls Vulnerability (CVE-2013-0345)
Apache Tomcat Resource Management Errors Vulnerability (CVE-2014-0230)
WebLogic Unrestricted Upload of File with Dangerous Type Vulnerability (CVE-2021-21347)
Play Framework Improper Input Validation Vulnerability (CVE-2015-2156)