CVE-2026-108903 pH7Builder before 19.3.0 CAPTCHA Bypass via Client-Chosen Form ID
Unauthenticated attackers can bypass CAPTCHA validation in pH7Builder by manipulating form IDs, enabling automated abuse of contact, comment, and signup features.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-108903?
CVE-2026-108903 is a medium-severity vulnerability in ph7software ph7builder, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-807
Which versions are affected by CVE-2026-108903?
How do I fix CVE-2026-108903?
No fix has been published for CVE-2026-108903 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-108903 being exploited?
There is no known exploitation of CVE-2026-108903 in the wild and no public exploit code.
Sources
Also known as GHSA-q5mq-9wc6-h8x8.