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    CVE-2023-27100

    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.

    Published:Mar 22, 2023
    Last Modified:Feb 25, 2025
    EPS:Mar 22, 2023
    EPSS Score:0.0225
    CVSS Score:9.8

    Affected Products

    Vendor
    Netgate
    Product
    Pfsense Plus
    Vendor
    Pfsense
    Product
    Pfsense

    Exploits

    https://www.exploit-db.com/exploits/51352https://github.com/DarokNET/CVE-2023-27100https://github.com/fabdotnet/CVE-2023-27100

    Related CVEs

    CVE-2026-38961 (CVSS 5.4) — Cross-Site Scripting (XSS) vulnerability in the RSS Widget of Netgate pfSense Plus (versions 26.03, 25.11.1) a…
    CVE-2026-56128 (CVSS 5.1) — pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Schedules: Edit pri…
    CVE-2026-56127 (CVSS 5.1) — pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Rules: Edit privile…
    CVE-2026-56126 (CVSS 5.1) — pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Status: Monitoring privilege …
    CVE-2026-67189 (CVSS 5.3) — pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored cross-site scripting vulnerability in …
    CVE-2025-34178 (CVSS 5.1) — In pfSense CE /suricata/suricata_app_parsers.php, the value of the policy_name parameter is not sanitized of H…
    CVE-2025-34177 (CVSS 5.1) — In pfSense CE /suricata/suricata_flow_stream.php, the value of the policy_name parameter is not sanitized of H…
    CVE-2025-34176 (CVSS 5.3) — In pfSense CE /suricata/suricata_ip_reputation.php, the value of the iplist parameter is not sanitized of dire…
    CVE-2025-34175 (CVSS 5.1) — In pfSense CE /usr/local/www/suricata/suricata_filecheck.php, the value of the filehash parameter is directly …
    CVE-2025-34174 (CVSS 5.1) — In pfSense CE /usr/local/www/status_traffic_totals.php, the value of the start-day parameter is not ensured to…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High