CVE-2026-22489: Image Slider Slideshow Auth Bypass Flaw

CVE-2026-22489 Overview

CVE-2026-22489 is an Authorization Bypass Through User-Controlled Key vulnerability affecting the Wptexture Image Slider Slideshow WordPress plugin. This Insecure Direct Object Reference (IDOR) vulnerability allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized access to resources that should be restricted.

The vulnerability stems from improper validation of user-supplied input when referencing objects, allowing authenticated users with low privileges to manipulate object references and access data or functionality beyond their authorized scope.

Critical Impact

Authenticated attackers with minimal privileges can bypass authorization controls to modify resources they should not have access to, potentially compromising the integrity of slider/slideshow configurations.

Affected Products

• Wptexture Image Slider Slideshow plugin versions through 1.8
• WordPress installations using the vulnerable Image Slider Slideshow plugin

Discovery Timeline

• 2026-01-08 - CVE-2026-22489 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2026-22489

Vulnerability Analysis

This vulnerability is classified as CWE-639: Authorization Bypass Through User-Controlled Key. The Image Slider Slideshow plugin fails to properly validate whether authenticated users have the appropriate permissions to access or modify specific slider resources. When a user submits a request containing an object identifier (such as a slider ID), the application does not adequately verify that the requesting user owns or has permission to access that particular object.

The network-accessible attack vector means that any authenticated user with low-level privileges (such as a subscriber role in WordPress) can potentially exploit this vulnerability remotely. The attack requires no user interaction and has low complexity, making it relatively straightforward to exploit once an attacker has authenticated access to the WordPress installation.

Root Cause

The root cause is improper access control implementation in the Image Slider Slideshow plugin. The application relies on user-supplied identifiers to retrieve or modify resources without performing adequate authorization checks. This allows authenticated users to reference objects belonging to other users or administrators by simply manipulating request parameters containing object identifiers.

Attack Vector

An attacker with valid low-privilege credentials to the WordPress installation can exploit this vulnerability by:

1. Authenticating to the WordPress site with any valid user account
2. Identifying API endpoints or form submissions that reference slider objects by ID
3. Manipulating the object identifier in requests to reference sliders created by other users or administrators
4. Performing unauthorized modifications to slider configurations that should be restricted

The vulnerability allows integrity compromise, meaning attackers can modify slider content without proper authorization, though confidentiality and availability are not directly impacted according to the CVSS assessment.

Detection Methods for CVE-2026-22489

Indicators of Compromise

• Unexpected modifications to slider or slideshow configurations by users who should not have edit access
• Log entries showing authenticated requests to slider management endpoints from low-privilege users
• Changes to slider content that do not correspond to legitimate administrative actions
• Unusual patterns of slider ID enumeration in request logs

Detection Strategies

• Monitor WordPress audit logs for slider modification events performed by non-administrative users
• Implement logging for all plugin-related AJAX endpoints and REST API calls
• Review access patterns to identify users accessing slider resources outside their ownership scope
• Deploy WordPress security plugins that can detect and alert on unauthorized resource access attempts

Monitoring Recommendations

• Enable comprehensive WordPress activity logging covering plugin interactions
• Set up alerts for modifications to Image Slider Slideshow configurations by subscriber or contributor-level users
• Regularly audit slider ownership and access patterns to identify potential abuse
• Consider implementing additional access control monitoring at the web application firewall level

How to Mitigate CVE-2026-22489

Immediate Actions Required

• Update the Image Slider Slideshow plugin to a patched version once available from the vendor
• Review all slider configurations for unauthorized modifications
• Audit user accounts to identify any potentially compromised or malicious low-privilege accounts
• Consider temporarily restricting plugin functionality to administrators only until patched
• Monitor for unusual plugin activity in WordPress logs

Patch Information

Organizations should monitor the Patchstack WordPress Vulnerability Report for official patch information and updates from the Wptexture vendor. Until an official patch is released, implement the workarounds described below.

Workarounds

• Restrict access to the Image Slider Slideshow plugin functionality to trusted administrators only
• Implement capability checks at the WordPress user role level to prevent low-privilege users from accessing slider management features
• Use a Web Application Firewall (WAF) to monitor and potentially block suspicious parameter manipulation attempts
• Consider temporarily deactivating the plugin if slider functionality is not critical to operations
• Implement additional server-side validation for all slider-related requests

# WordPress configuration - restrict plugin capabilities
# Add to your theme's functions.php or a custom security plugin

# Example: Remove slider capability from non-admin users
# Consult plugin documentation for specific capability names
# wp-config.php - Enable debug logging to monitor for exploitation attempts
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);