Executive Summary

CVE-2026-39510 is an Insecure Direct Object References (IDOR) vulnerability found in the WordPress Image Photo Gallery Final Tiles Grid Plugin versions up to and including 3.6.11.

This vulnerability allows unauthorized users to bypass authorization and authentication mechanisms by exploiting incorrectly configured access control security levels.

As a result, attackers with author or developer level privileges can potentially access sensitive files, folders, or interact with the database without proper permission.

The issue is classified under OWASP Top 10 A1: Broken Access Control and has a low severity with a CVSS score of 2.7.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can allow attackers to bypass access controls and gain unauthorized access to sensitive files, folders, or database interactions within the affected WordPress plugin.

Although the severity is low and the risk is considered minimal, exploitation could lead to unauthorized data exposure or manipulation.

Such vulnerabilities are often targeted in mass-exploit campaigns affecting many websites indiscriminately.

Users with author or developer privileges are required for exploitation, which limits the attack surface somewhat.

To mitigate the risk, updating the plugin to version 3.6.12 or later is recommended.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability affects the WordPress Image Photo Gallery Final Tiles Grid Plugin versions up to and including 3.6.11. Detection involves identifying if this plugin and vulnerable version is installed on your WordPress site.

You can check the installed plugin version by accessing your WordPress admin dashboard or by running commands on your server to inspect the plugin files.

• Use WP-CLI to list installed plugins and their versions: wp plugin list
• Check the plugin version directly in the plugin directory, for example: grep 'Version' wp-content/plugins/final-tiles-grid-gallery-lite/final-tiles-grid-gallery-lite.php

Network detection of exploitation attempts may be difficult due to the nature of the vulnerability (authorization bypass), but monitoring for unusual access patterns or unauthorized access to plugin-related endpoints could help.

Useful 0 Not Useful 0

Mitigation Strategies

The primary mitigation step is to update the WordPress Image Photo Gallery Final Tiles Grid Plugin to version 3.6.12 or later, where this vulnerability has been patched.

If immediate updating is not possible, consider restricting access to the plugin files or disabling the plugin temporarily to prevent exploitation.

Additionally, ensure that only trusted users have author or developer level privileges, as exploitation requires such privileges.

Using security plugins or services that provide automatic updates and monitoring, such as Patchstack, can also help mitigate risks.

Useful 0 Not Useful 0

Compliance Impact

CVE-2026-39510 is an authorization bypass vulnerability that allows unauthorized users to access sensitive files, folders, or interact with the database due to broken access control.

Such unauthorized access to sensitive data can potentially lead to non-compliance with data protection regulations like GDPR and HIPAA, which require strict access controls to protect personal and sensitive information.

Although the vulnerability is rated as low severity and exploitation is considered unlikely to cause significant impact, failure to patch this issue could expose organizations to risks of data breaches and regulatory penalties.

Therefore, timely updating to the patched version (3.6.12 or later) is important to maintain compliance with common security standards and regulations.

Useful 0 Not Useful 0