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Vulnerability record · CVE-2026-37604 · published 22 September 2026

CVE-2026-37604: HTTP request smuggling vulnerability

pH7Software pH7Builder (pH7 Social Dating CMS) through 18.2.0 resolves the client IP address in _protected/framework/Ip/Ip.class.php from the HTTP_CLIENT_IP and HTTP_X_FORWARDED_FOR headers without verifying the request comes from a trusted proxy. Because the admin login attempt counter and lockout are keyed on this value, a remote unauthenticated attacker bypasses IP-based throttling by sending a different X-Forwarded-For value per request

9.8 CVSS 3.1 Critical EPSS 0.66% · top 50.6% CWE-444 · HTTP request smuggling Deferred
9.8CVSS 3.1 base score
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
23 Sep 2026Last modified by NVD

Description

pH7Software pH7Builder (pH7 Social Dating CMS) through 18.2.0 resolves the client IP address in _protected/framework/Ip/Ip.class.php from the HTTP_CLIENT_IP and HTTP_X_FORWARDED_FOR headers without verifying the request comes from a trusted proxy. Because the admin login attempt counter and lockout are keyed on this value, a remote unauthenticated attacker bypasses IP-based throttling by sending a different X-Forwarded-For value per request

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://cybermapgroup.com/en/blog/admin-brute-force-protection-bypass-chain-in-ph7builder
https://github.com/pH7Software/pH7-Social-Dating-CMS
https://ph7builder.com

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Source: NIST National Vulnerability Database (record CVE-2026-37604), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.