ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-26600
- https://hackerone.com/reports/1081986
- http://karmainsecurity.com/KIS-2022-01
- http://packetstormsecurity.com/files/166393/ImpressCMS-1.4.2-Authentication-Bypass.html
- http://seclists.org/fulldisclosure/2022/Mar/43
- https://github.com/ImpressCMS/impresscms/releases/tag/v1.4.3
- https://github.com/advisories/GHSA-m8xh-cqc2-5q6f