CVE-2021-26600
CRITICALCVSS 9.8/10EPSS 5.54%
Last modified
CVE-2021-26600 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).. EPSS estimates a 5.54% chance of exploitation in the next 30 days.
Description
ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Impresscms | Impresscms | < 1.4.3 |
References
- http://karmainsecurity.com/KIS-2022-01Third Party Advisory
- http://packetstormsecurity.com/files/166393/ImpressCMS-1.4.2-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2022/Mar/43Exploit, Mailing List, Third Party Advisory
- https://hackerone.com/reports/1081986Exploit, Third Party Advisory
- http://karmainsecurity.com/KIS-2022-01Third Party Advisory
- http://packetstormsecurity.com/files/166393/ImpressCMS-1.4.2-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2022/Mar/43Exploit, Mailing List, Third Party Advisory
- https://hackerone.com/reports/1081986Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26600?
ImpressCMS before 1.4.3 has plugins/preloads/autologin.php type confusion with resultant Authentication Bypass (!= instead of !==).
How severe is CVE-2021-26600?
CVE-2021-26600 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.54% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26600?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-26600?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST