CVE-2026-108903

MEDIUM 5.3

pH7Builder before 19.3.0 CAPTCHA Bypass via Client-Chosen Form ID

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-807
Vendor	ph7software
Product	ph7builder
Published	Oct 11, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

ph7software / ph7builder

0 < 19.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/pH7Software/pH7-Social-Dating-CMS/commit/4758d7d2ebfd5772faa25ef728c14f8f452e82f4 github.com: https://github.com/pH7Software/pH7-Social-Dating-CMS/blob/v19.2.0/_protected/app/system/modules/contact/forms/ContactForm.php#L33-L38 github.com: https://github.com/pH7Software/pH7-Social-Dating-CMS vulncheck.com: https://www.vulncheck.com/advisories/ph7builder-before-19.3.0-captcha-bypass-via-client-chosen-form-id

Credits

Haluk Baran AKBULUT (CyberMap Group)