CVE-2026-95588

AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress <= 11.0.5 - Unauthenticated Arbitrary File Deletion

2026-10-01 00:00

Strategic Overview

Status: Patched in 11.1.0
Affected Plugin: AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress
Affected Version: <= 11.0.5
CVSS: 9.1Critical
Weakness type: CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE: CVE-2026-95588

View all AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress vulnerabilities

At a glance

CVE-2026-95588 is a critical-severity Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in the AcyMailing WordPress plugin, affecting versions <= 11.0.5. It carries a CVSS score of 9.1 (reachable over the network; low attack complexity; high integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 11.1.0; sites on affected versions should update now. Disclosed October 2026, reported by Oly Hossen.

Vulnerability Overview

The AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress plugin for WordPress is vulnerable to Arbitrary File Deletion due to insufficient file path validation in the [function_or_param] function in all versions up to, and including, 11.0.5. This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php).

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on integrity, availability.

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Reaching this weakness in AcyMailing <= 11.0.5 takes no account at all. Path traversal happens when user-controlled text is used to build a filesystem path without being constrained to an intended directory, so sequences like ../ walk the resolved path somewhere else.

Depending on the operation, it means reading files outside the intended folder — wp-config.php being the usual target — or writing to and deleting paths the web server can touch. For AcyMailing the fix is 11.1.0: builds <= 11.0.5 are affected, anything from 11.1.0 onward is not.

Remediation

Update to version 11.1.0, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: AcyMailing 11.1.0 closes this, and updating the plugin is the step that ends it.

Firewall
Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-95588 https://www.wordfence.com/threat-intel/vulnerabilities/id/01c79167-69c5-4297-a03c-7218b1f123c7 https://nvd.nist.gov/vuln/detail/CVE-2026-95588

Related records

Same weakness class

7.5CVE-2026-77807: AcyMailing Arbitrary File ReadCVE-2026-77807

Other vulnerabilities in AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress

CVSS Vector

9.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityHigh

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