CVE-2026-127206
Image CAPTCHA for Contact Form 7 and WPForms 3.3.29 CAPTCHA Bypass
Image CAPTCHA for Contact Form 7 and WPForms through 3.3.29 contains a CAPTCHA bypass vulnerability that allows unauthenticated attackers to defeat the anti-automation control by exploiting a hardcoded static answer in the Contact Form 7 integration. Attackers can submit kc_captcha=kc_human to pass validation in cf7ic_check_if_spam() on every protected form, enabling automated contact-form spam and abuse of actions gated only by this CAPTCHA.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Image CAPTCHA for Contact Form 7 and WPForms by HookAndHook (DSGVO/GDPR) hookandhook |
≥ 0; ≤ 3.3.29 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
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: VulnCheck |
| 3.1 / 5.3 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | CNA: VulnCheck |
Exploit evidence
- https://hackmd.io/@buiih/S1pRnCeCfl
exploit · CNA: VulnCheck
References
- https://hackmd.io/@buiih/S1pRnCeCflCNA: VulnCheck · technical-description, exploit
- https://wordpress.org/plugins/contact-form-7-image-captcha/CNA: VulnCheck · product
- https://www.vulncheck.com/advisories/image-captcha-for-contact-form-7-and-wpforms-captcha-bypassCNA: VulnCheck · third-party-advisory
For agents and automation
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