CVE-2026-108903 json
pH7Builder before 19.3.0 CAPTCHA Bypass via Client-Chosen Form ID
published 2026-10-11 28 d ago modified 2026-10-13 26 d ago also EUVD-2026-97066
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
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 CAPTCHA-free form like login or search, then submit its ID with contact, comment, forum, invite or signup data to automate abuse.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 26 d ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- ph7software ph7builder
Classification
- Weakness
-
- CWE-807 Reliance on Untrusted Inputs in a Security Decision
References
-
github.com
/pH7Software/pH7-Social-Dating-CMS/commit/4758d7d2ebfd5772faa25ef728c14f8f452e82f4
patch
-
github.com
/pH7Software/pH7-Social-Dating-CMS/blob/v19.2.0/_protected/app/system/modules/contact/forms/ContactForm.php#L3
technical-description
-
github.com
/pH7Software/pH7-Social-Dating-CMS
product
-
vulncheck.com
/advisories/ph7builder-before-19.3.0-captcha-bypass-via-client-chosen-form-id
third-party-advisory
Sources
- CVE List CVE-2026-108903
- NVD CVE-2026-108903
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.