CVE-2026-24631: Rosebud Authorization Bypass Vulnerability

CVE-2026-24631 Overview

CVE-2026-24631 is an Authorization Bypass Through User-Controlled Key vulnerability (also known as Insecure Direct Object Reference or IDOR) affecting the Rosebud WordPress theme by Mikado-Themes. This vulnerability allows authenticated attackers to exploit incorrectly configured access control security levels, potentially accessing or modifying resources belonging to other users.

The vulnerability stems from CWE-639 (Authorization Bypass Through User-Controlled Key), where the application uses user-supplied input to directly access objects without proper authorization checks. Attackers with low-level privileges can manipulate object references to access unauthorized data.

Critical Impact
Authenticated attackers can bypass authorization controls to access or modify data belonging to other users, compromising the confidentiality and integrity of WordPress site content.

Affected Products

Rosebud WordPress Theme versions through 1.4
WordPress sites using vulnerable Rosebud theme installations
Mikado-Themes Rosebud theme (all versions up to and including 1.4)

Discovery Timeline

2026-01-23 - CVE-2026-24631 published to NVD
2026-01-26 - Last updated in NVD database

Technical Details for CVE-2026-24631

Vulnerability Analysis

This Insecure Direct Object Reference (IDOR) vulnerability exists in the Rosebud WordPress theme's access control implementation. The theme fails to properly validate that authenticated users have authorization to access specific resources before serving them. When a user submits a request containing an object identifier (such as a post ID, user ID, or other database reference), the application uses this identifier directly without verifying that the requesting user has legitimate access rights to that particular object.

The attack requires authentication, meaning an attacker must first obtain valid credentials to the WordPress site. However, even users with minimal privileges (such as subscribers) can potentially exploit this vulnerability to access content or functionality that should be restricted to higher-privileged users or other specific accounts.

Root Cause

The root cause of this vulnerability is improper authorization validation in the Rosebud theme. The application accepts user-controlled keys (object identifiers) and uses them to retrieve or modify data without implementing proper access control checks. This allows authenticated users to manipulate these identifiers to reference objects they should not have access to.

The theme likely implements functionality that accepts parameters like user IDs, post IDs, or other identifiers directly from user input and fails to verify ownership or permission before performing operations on those objects.

Attack Vector

The vulnerability is exploitable over the network by authenticated users. An attacker with low-level WordPress credentials (such as a subscriber account) can manipulate request parameters to access resources belonging to other users. The attack does not require user interaction and can be performed directly through crafted HTTP requests to the vulnerable theme endpoints.

The exploitation technique typically involves:

Authenticating to the WordPress site with any valid user account
Identifying endpoints that accept object identifiers as parameters
Enumerating or guessing valid identifiers for other users' resources
Submitting requests with manipulated identifiers to access unauthorized data

For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-24631

Indicators of Compromise

Unusual access patterns to theme-specific endpoints by low-privileged users
Sequential or enumerated requests to endpoints accepting numeric identifiers
Access log entries showing authenticated users accessing resources outside their normal scope
Failed authorization attempts followed by successful access to different object IDs

Detection Strategies

Monitor WordPress access logs for authenticated requests with parameter manipulation patterns
Implement Web Application Firewall (WAF) rules to detect IDOR exploitation attempts
Review theme-specific endpoint access for anomalous behavior from subscriber-level accounts
Deploy intrusion detection signatures for common IDOR exploitation patterns

Monitoring Recommendations

Enable detailed WordPress audit logging to track user actions and resource access
Set up alerts for users accessing resources that don't belong to them
Monitor for high volumes of requests with incrementing or varying object identifiers
Review authentication logs for suspicious account activity preceding data access

How to Mitigate CVE-2026-24631

Immediate Actions Required

Update the Rosebud theme to a patched version when available from Mikado-Themes
Review and restrict user registration if not required for site functionality
Audit existing user accounts for suspicious activity or unauthorized access
Implement additional access control plugins as a defense-in-depth measure

Patch Information

Website administrators should check with Mikado-Themes for an updated version of the Rosebud theme that addresses this vulnerability. The vulnerable versions include all releases through version 1.4. Monitor the Patchstack advisory for updates on patch availability.

Workarounds

Restrict user registration to trusted users only until a patch is available
Implement a security plugin that provides additional access control enforcement
Consider temporarily disabling theme-specific functionality that handles user-controlled object references
Use a WAF to filter requests that attempt to manipulate object identifiers

bash

# WordPress configuration - restrict user registration
# Add to wp-config.php to disable user registration if not needed
define('WP_ALLOW_MULTISITE', false);

# Alternatively, disable registration via wp-admin:
# Settings > General > Membership > Uncheck "Anyone can register"