gm_alex User Access Manager Plugin up to 2.3.12 on WordPress saveAjaxAttachmentData/addQueryExcludedPostFilter ID sql injection

Summaryinfo

A vulnerability was found in gm_alex User Access Manager Plugin up to 2.3.12. It has been rated as critical. The impacted element is the function saveAjaxAttachmentData/addQueryExcludedPostFilter. Performing a manipulation of the argument ID results in sql injection. This vulnerability is known as CVE-2026-15281. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in gm_alex User Access Manager Plugin up to 2.3.12. This affects the function saveAjaxAttachmentData/addQueryExcludedPostFilter. The manipulation of the argument id with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The User Access Manager plugin for WordPress is vulnerable to Second-Order SQL Injection via the 'id' parameter of the wp_ajax_save-attachment-compat AJAX action in versions up to, and including, 2.3.12. This is due to insufficient validation on the objectId value stored in the saveAjaxAttachmentData() function and subsequent unparameterized concatenation in the addQueryExcludedPostFilter() function — the stored value is later retrieved from the database and used as an array key, then directly imploded into a SQL NOT IN() clause without integer casting or prepared statements. This makes it possible for authenticated attackers, with subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-15281 since 07/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/05/2026). MITRE ATT&CK project uses the attack technique T1505 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• gm_alex

Name

• User Access Manager Plugin

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5
• 2.3.6
• 2.3.7
• 2.3.8
• 2.3.9
• 2.3.10
• 2.3.11
• 2.3.12

CPE 2.3info

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• 🔒
• 🔒

CPE 2.2info

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• 🔒

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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