What’s Vulnerable › Vulnerabilities

CVE-2023-27100

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-03-22 · updated 2026-06-17
• Weakness: CWE-307

Description

Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.

Affected products

• Netgate Pfsense Plus: 22.05.1
• Netgate pfSense CE: 2.6.0

References

• http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html
• https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc
• https://redmine.pfsense.org/issues/13574
• http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html
• https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc
• https://redmine.pfsense.org/issues/13574
• https://packetstorm.news/files/id/171791

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