Vulnerability · Published Oct 11, 2026 · Assigned by VulnCheck

CVE-2026-108903pH7Builder before 19.3.0 CAPTCHA Bypass via Client-Chosen Form ID

Medium 5.3

In plain English

A medium-severity security flaw in ph7builder from ph7software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 80.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

pH7Builder (pH7 Social Dating CMS) before 19.3.0 contains a CAPTCHA bypass vulnerability that allows unauthenticated attackers to skip form validation by supplying a client-chosen form ID to PFBC Form::isValid(). Attackers can load a CAPTCHA-free form like login or search, then submit its ID with contact, comment, forum, invite or signup data to automate abuse.

Affected products (as reported)

Vendor	Product	Versions
ph7software	ph7builder	0 – before 19.3.0

Weakness: CWE-807 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Patch Commit patch
https://github.com/pH7Software/pH7-Social-Dating-CMS/blob/v19.2.0/_protected/app/system/modules/contact/forms/ContactForm.php#L33-L38 technical-description
https://github.com/pH7Software/pH7-Social-Dating-CMS product
VulnCheck Advisory: pH7Builder before 19.3.0 CAPTCHA Bypass via Client-Chosen Form ID third-party-advisory