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Form Maker - Remote Code Execution (CVE-2023-4666)

CVE-2023-4666

Vulnerability CVE-2023-4666 PLUGIN form-maker CRITICAL

The Form Maker by 10Web WordPress plugin before 1.15.20 does not validate signatures when creating them on the server from user input, allowing unauthenticated users to create arbitrary files and lead to RCE

CVE-2023-4666

CRITICAL CVSS 9.8 Published 2023-10-16 Updated 2026-06-17
AI Risk Critical (100/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P1 Immediate
Severity Band CRITICAL
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Components 2
Reference Links 1
AI Risk Engine Critical (100/100)
Exploitability Very High
Active Exploitation No strong signal
Published Exploit Status No public exploit references

Threat Timeline

  1. 2023-10-16 CVE published and first recorded in the threat feed.
  2. 2026-06-17 Record updated with latest vulnerability metadata.
  3. 2026-04-09 AI technical context refreshed for mitigation and impact guidance.
  4. Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 164 days ago

AI enriched 164 days ago (2026-04-09 06:31 UTC)

Technical Summary

The Form Maker by 10Web WordPress plugin before 1.15.20 does not validate signatures when creating them on the server from user input, allowing unauthenticated users to create arbitrary files and lead to RCE

Potential Impact

Severity is CRITICAL (CVSS 9.8). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as Very High based on remote code execution potential, low-bar exploit prerequisites.

Primary risk drivers: remote code execution potential, low-bar exploit prerequisites

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Form Maker PLUGIN · form-maker Affected: < 1.15.20 Fixed in: 1.15.20
Form Maker by 10Web PLUGIN · form-maker-by-10web Affected: < 1.15.20 Fixed in: 1.15.20

Related Vulnerabilities

Browse All Threats

Newest linked vulnerabilities to keep visitors exploring adjacent CVE coverage.

Form Maker - Cross-Site Scripting (XSS) (CVE-2026-85645) CVE-2026-85645 Published 2026-09-10 New Form Maker - SQL Injection (CVE-2026-15993) CVE-2026-15993 Published 2026-08-15 Form Maker - SQL Injection (CVE-2026-11777) CVE-2026-11777 Published 2026-06-18 Form Maker - SQL Injection (CVE-2026-11776) CVE-2026-11776 Published 2026-06-18 Form Maker - SQL Injection (CVE-2018-25346) CVE-2018-25346 Published 2026-05-23 Form Maker - SQL Injection (CVE-2026-3359) CVE-2026-3359 Published 2026-05-05

References

What to do about this

Patch immediately Serious, and reachable without meaningful privilege.

Fix it

Update Form Maker to 1.15.20 or later.

That is the complete fix. Everything below is what protects you in the meantime.

Cannot update today? Request / payload inspection (WAF) in Hack Halt ProSecure blocks this class of attack before WordPress processes the request.

Inspect request parameters and bodies for injection, traversal and file-inclusion payloads, and refuse the request rather than logging it.

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Not sure if you are affected?

Scan your site to see whether it runs Form Maker, and at which version.

Free, no installation, no account. It reads what your site already publishes, then tells you which plugins carry known vulnerabilities and what to do about each one.

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Am I affected by this vulnerability?

You are affected if your site runs Form Maker. Versions below 1.15.20 are vulnerable; that release and later are not. No account is needed to exploit this, so a public site is reachable by anyone.

How do I fix it?

Update Form Maker to version 1.15.20 or later. That is the complete fix. Until you can update, Request / payload inspection (WAF) in Hack Halt ProSecure contains this class of attack at the request layer.

What can an attacker actually do?

This is a Remote Code Execution flaw. An attacker who exploits it can run their own code on the server, which is total control of the site.

WordPress security that blocks attacks before they land.

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