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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/pH7Software/pH7-Social-Dating-CMS
disclosure@vulncheck.com
https://github.com/pH7Software/pH7-Social-Dating-CMS/blob/v19.2.0/_protected/ap…
disclosure@vulncheck.com
https://github.com/pH7Software/pH7-Social-Dating-CMS/commit/4758d7d2ebfd5772faa…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/ph7builder-before-19.3.0-captcha-bypass-vi…
disclosure@vulncheck.com