# CVE-2026-127206: Image CAPTCHA for Contact Form 7 and WPForms 3.3.29 CAPTCHA Bypass

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- hookandhook / Image CAPTCHA for Contact Form 7 and WPForms by HookAndHook (DSGVO/GDPR): ≥ 0; ≤ 3.3.29 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 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; source: CNA: VulnCheck

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-804

## Exploit evidence

- exploit: https://hackmd.io/@buiih/S1pRnCeCfl (CNA: VulnCheck)

## References

- https://hackmd.io/@buiih/S1pRnCeCfl (CNA: 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-bypass (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-127206; retrieved 2026-11-12; source updated 2026-11-12

Revision: f1f5acfb98d32d03b6b578436f1c7ad70d497d1ce3296fb81d2e1bfd3ee9cc5f

Canonical: https://y2.dev/cve/CVE-2026-127206

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.