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Acymailing - Security Vulnerability (CVE-2026-94389)

CVE-2026-94389

Vulnerability CVE-2026-94389 PLUGIN acymailing CRITICAL

Unauthenticated Remote Code Execution (RCE) in AcyMailing SMTP Newsletter

CVE-2026-94389

CRITICAL CVSS 9.0 Published 2026-09-30 Updated 2026-09-30
AI Risk Critical (98/100) 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:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected Components 1
Reference Links 1
AI Risk Engine Critical (98/100)
Exploitability Very High
Active Exploitation No strong signal
Published Exploit Status No public exploit references

Threat Timeline

  1. 2026-09-30 CVE published and first recorded in the threat feed.
  2. 2026-09-30 Record updated with latest vulnerability metadata.
  3. 2026-10-01 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 6 days ago

AI enriched 6 days ago (2026-10-01 23:36 UTC)

Technical Summary

Unauthenticated Remote Code Execution (RCE) in AcyMailing SMTP Newsletter

Potential Impact

Severity is CRITICAL (CVSS 9.0). 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

AI risk score 98/100 (Critical, Very High) with priority P1 Immediate. Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Acymailing PLUGIN · acymailing Affected range not specified Fixed version not specified

Related Vulnerabilities

Browse All Threats

Newest linked vulnerabilities to keep visitors exploring adjacent CVE coverage.

Acymailing - Security Vulnerability (CVE-2026-95588) CVE-2026-95588 Published 2026-10-01 New AcyMailing - Path Traversal (CVE-2026-77807) CVE-2026-77807 Published 2026-09-11 Acymailing - Broken Access Control (CVE-2026-15426) CVE-2026-15426 Published 2026-08-11 Acymailing - SQL Injection (CVE-2026-57739) CVE-2026-57739 Published 2026-07-13 Acymailing - Cross-Site Scripting (XSS) (CVE-2026-57741) CVE-2026-57741 Published 2026-07-13 Acymailing - Broken Access Control (CVE-2026-57740) CVE-2026-57740 Published 2026-07-13

References

What to do about this

Patch immediately Serious, and reachable without meaningful privilege.

Fix it

Update Acymailing to the latest available version.

Where the vendor has not published a fix yet, disable the plugin until they do.

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 Acymailing, 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 Acymailing. No account is needed to exploit this, so a public site is reachable by anyone.

How do I fix it?

Update Acymailing to the latest available version. Where the vendor has not yet published a fix, remove or disable the plugin until they do. 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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