---
id: CVE-2026-108903
title: >-
  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()
summary: >-
  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 CAP…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-807
published: '2026-10-11'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T15:16:56.600'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108903'
references:
  - url: 'https://github.com/pH7Software/pH7-Social-Dating-CMS'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pH7Software/pH7-Social-Dating-CMS/blob/v19.2.0/_protected/app/system/modules/contact/forms/ContactForm.php#L33-L38
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pH7Software/pH7-Social-Dating-CMS/commit/4758d7d2ebfd5772faa25ef728c14f8f452e82f4
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/ph7builder-before-19.3.0-captcha-bypass-via-client-chosen-form-id
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T14:50:34.064Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.