CVE-2026-12918
Deferred Deferred - Pending Action

SQL Injection in Mail Mint WordPress Plugin

Publication date: 2026-07-10

Last updated on: 2026-07-14

Assigner: Wordfence

Description
The Mail Mint – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress is vulnerable to generic SQL Injection via the 'recipients' parameter in all versions up to, and including, 1.24.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is a second-order SQL injection: the malicious payload is first stored unsanitized via a POST request to /mrm/v1/campaigns/ (bypassing filter_recipients() validation because an int-cast of a string like '1) OR ...' evaluates to a real numeric ID), and is then triggered by a subsequent GET request to /mrm/v1/campaigns/{id} that deserializes the recipients and passes the raw id string through array_column() into the vulnerable query.

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Meta Information

Published
2026-07-10
Last Modified
2026-07-14
Generated
2026-07-30
AI Q&A
2026-07-10
EPSS Evaluated
2026-07-28
NVD
CVE-2026-12918
EUVD
EUVD-2026-42862

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mail_mint email_marketing_plugin to 1.24.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

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Executive Summary

The vulnerability is a generic SQL Injection in the Mail Mint – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress, affecting all versions up to and including 1.24.1.

It occurs via the 'recipients' parameter due to insufficient escaping of user-supplied input and lack of proper preparation of the SQL query.

This is a second-order SQL injection where a malicious payload is first stored unsanitized through a POST request and later triggered by a GET request that processes the stored data in a vulnerable SQL query.

Only authenticated attackers with administrator-level access or higher can exploit this vulnerability.

Detection Guidance

This vulnerability involves a second-order SQL injection via the 'recipients' parameter in the Mail Mint WordPress plugin. Detection would involve monitoring for unusual POST requests to /mrm/v1/campaigns/ containing suspicious payloads that attempt to inject SQL, such as strings including SQL syntax like ') OR'.

Additionally, detection can include monitoring GET requests to /mrm/v1/campaigns/{id} that trigger the injection by deserializing malicious recipients data.

Specific commands are not provided in the available resources, but typical detection methods might include inspecting web server logs or using intrusion detection systems to look for suspicious SQL-like payloads in POST data to the mentioned endpoints.

Impact Analysis

An attacker with administrator-level access can exploit this vulnerability to append additional SQL queries to existing ones.

This can be used to extract sensitive information from the database, potentially compromising confidential data.

Compliance Impact

This vulnerability allows authenticated attackers with administrator-level access to perform SQL injection attacks that can extract sensitive information from the database.

Exposure of sensitive information due to this vulnerability could potentially lead to non-compliance with data protection regulations such as GDPR and HIPAA, which require safeguarding personal and sensitive data against unauthorized access.

However, the provided information does not explicitly detail the impact on compliance with these standards.

Mitigation Strategies

Immediate mitigation steps include updating the Mail Mint plugin to a version later than 1.24.1 where this vulnerability is fixed.

If an update is not immediately possible, restrict administrator-level access to trusted users only, as the vulnerability requires authenticated administrator-level access.

Additionally, monitor and restrict POST requests to /mrm/v1/campaigns/ to prevent injection of malicious payloads.

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