Login Request a demo
Medium severity · published Oct 11, 2026
CVE-2026-108903
pH7Builder before 19.3.0 CAPTCHA Bypass via Client-Chosen Form ID
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
ph7builder · ph7software
before 19.3.0 · source: vendor
Affected product
PH
ph7builder
ph7software
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108903
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-108903
patch
https://github.com/pH7Software/pH7-Social-Dating-CMS/commit/4758d7d2ebfd5772faa25ef728c14f8f452e82f4
technical-description
https://github.com/pH7Software/pH7-Social-Dating-CMS/blob/v19.2.0/_protected/app/system/modules/contact/forms/ContactForm.php#L33-L38
product
https://github.com/pH7Software/pH7-Social-Dating-CMS
third-party-advisory
https://www.vulncheck.com/advisories/ph7builder-before-19.3.0-captcha-bypass-via-client-chosen-form-id
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