Description
IISv5 has a "Hit-highlighting" functionality that opens some site object and highlights some part of it, that has had a transversal vulnerability in the past. Now it can be used to bypass the IIS authentication.
Remediation
Protect the files from the NTFS filesystem instead of relying on the
IIS protection.
Microsoft recommends not to use IISv5 and update to IISv6.
References
Related Vulnerabilities
MediaWiki Improper Access Control Vulnerability (CVE-2015-8008)
WordPress 4.8.x Directory Traversal (4.8 - 4.8.24)
Django Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2018-6188)
Drupal Core 9.2.x Security Bypass (9.2.0 - 9.2.20)
PostgreSQL Missing Authorization Vulnerability (CVE-2020-1720)