meum Tutor LMS Plugin up to 4.0.5 on WordPress Tutor Course Filter AJAX single-content-loader.php tutor_load_template improper authorization

Summaryinfo

A vulnerability identified as critical has been detected in meum Tutor LMS Plugin up to 4.0.5. Impacted is the function tutor_load_template of the file templates/single-content-loader.php of the component Tutor Course Filter AJAX. Performing a manipulation results in improper authorization. This vulnerability is cataloged as CVE-2026-16759. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in meum Tutor LMS Plugin up to 4.0.5. This affects the function tutor_load_template of the file templates/single-content-loader.php of the component Tutor Course Filter AJAX. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Remote Code Execution limited to zero-argument function invocation in all versions up to, and including, 4.0.5 via the tutor_course_filter_ajax AJAX action. This is due to missing authorization on the handler combined with unsanitized array keys being passed to extract() inside tutor_load_template(), allowing attacker-controlled POST data to overwrite the local $template variable and, in the resulting templates/single-content-loader.php template, the $method_map and $context variables invoked at $method_map[$context](). This makes it possible for unauthenticated attackers to call an arbitrary zero-argument PHP function server-side and, via WordPress core edit_user(), to create a persistent subscriber-level account from request parameters.

The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-16759 since 07/23/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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 08/28/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

By approaching the search of inurl:templates/single-content-loader.php it is possible to find vulnerable targets with Google Hacking.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-67406). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• meum

Name

• Tutor LMS Plugin

Version

• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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