CVE-2026-77807
Received Received - Intake

AcyMailing WordPress Plugin Directory Traversal Vulnerability

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: Wordfence

Description
The AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 11.0.4 via the `user[name]` Parameter. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information. Exploitation requires "Embed images" option in AcyMailing configuration being enabled.

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-11
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-77807
EUVD
EUVD-2026-75889

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
acyba acymailing to 11.0.4 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

This vulnerability is a Directory Traversal issue in the AcyMailing WordPress plugin up to version 11.0.4. It allows unauthenticated attackers to read arbitrary files on the server by exploiting the user[name] parameter. The attack requires the 'Embed images' option in AcyMailing to be enabled.

Detection Guidance

To detect this vulnerability, check if the AcyMailing plugin version is up to, and including, 11.0.4. Verify if the 'Embed images' option is enabled in AcyMailing configuration. Look for unusual file access patterns or unauthorized file reads in server logs.

Impact Analysis

An attacker could exploit this to access sensitive files on your server, such as configuration files, logs, or other confidential data. This could lead to data breaches, unauthorized access to system information, or further attacks on your WordPress site.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements. Organizations may face legal penalties, fines, or reputational damage due to non-compliance if such data is exposed.

Mitigation Strategies

Immediately update the AcyMailing plugin to the latest version beyond 11.0.4. Disable the 'Embed images' option in AcyMailing configuration if not required. Review server logs for signs of exploitation and restrict file access permissions.

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