CVE-2026-24532 Overview
CVE-2026-24532 is a Missing Authorization vulnerability [CWE-862] in the SiteLock Security – WP Hardening, Login Security & Malware Scans plugin for WordPress. The flaw affects all versions up to and including 5.0.2. Authenticated users with low-level privileges can exploit incorrectly configured access control checks to invoke plugin functions they should not reach. The issue impacts integrity by enabling unauthorized modification of plugin-controlled settings without affecting confidentiality or availability. Patchstack published the advisory tracking this issue under the SiteLock Security plugin entry.
Critical Impact
Authenticated attackers with minimal privileges can bypass access control on the SiteLock Security plugin and trigger restricted actions on WordPress sites running version 5.0.2 or earlier.
Affected Products
- SiteLock Security – WP Hardening, Login Security & Malware Scans plugin for WordPress
- All versions from initial release through 5.0.2
- WordPress installations with the vulnerable plugin enabled
Discovery Timeline
- 2026-01-23 - CVE-2026-24532 published to NVD
- 2026-04-28 - Last updated in NVD database
Technical Details for CVE-2026-24532
Vulnerability Analysis
The vulnerability is a Broken Access Control flaw classified under [CWE-862] Missing Authorization. The plugin exposes one or more actions that perform privileged operations without verifying that the caller holds the required capability. An authenticated attacker with a low-privilege role, such as Subscriber or Contributor, can submit requests directly to the vulnerable endpoints and execute restricted functionality.
The attack vector is Network, exploitation complexity is Low, and the attacker needs only low privileges. No user interaction is required. The integrity impact is limited because the affected actions modify plugin state rather than core WordPress data. There is no direct impact on confidentiality or availability based on the CVSS vector.
The EPSS probability is 0.013%, indicating low observed likelihood of exploitation activity at the time of analysis. No public proof-of-concept exploit is currently listed, and the issue is not on the CISA Known Exploited Vulnerabilities catalog.
Root Cause
The plugin's request handlers fail to enforce capability checks such as current_user_can() or to validate nonces consistently before executing sensitive operations. Access decisions rely on assumptions about who can reach the endpoint rather than explicit authorization logic.
Attack Vector
An attacker authenticates to the WordPress site using any valid low-privileged account. The attacker then issues HTTP requests to plugin-exposed admin-ajax or REST routes that should be restricted to administrators. Because the handler does not validate the caller's role, the action executes and modifies plugin configuration or security state.
The vulnerability manifests in plugin request handlers that omit capability checks. Refer to the Patchstack Vulnerability Advisory for handler-level technical details.
Detection Methods for CVE-2026-24532
Indicators of Compromise
- Unexpected changes to SiteLock Security plugin configuration or hardening rules on WordPress installations running version 5.0.2 or earlier
- Requests to plugin-specific admin-ajax actions or REST endpoints originating from accounts with Subscriber or Contributor roles
- Audit log entries showing privileged plugin actions performed by non-administrative user IDs
Detection Strategies
- Inventory WordPress sites and identify installations running SiteLock Security plugin versions through 5.0.2
- Review web server access logs for POST requests to admin-ajax.php or /wp-json/ paths tied to the SiteLock plugin from low-privileged sessions
- Compare plugin settings against a known-good baseline to identify unauthorized state changes
Monitoring Recommendations
- Enable WordPress audit logging to capture user IDs, roles, and actions for all plugin-driven changes
- Alert on plugin configuration writes performed by users outside the administrator role
- Track authentication events for low-privileged accounts followed by requests to plugin management endpoints
How to Mitigate CVE-2026-24532
Immediate Actions Required
- Update the SiteLock Security – WP Hardening, Login Security & Malware Scans plugin to a version newer than 5.0.2 once the vendor publishes a fixed release
- Audit existing WordPress user accounts and remove or suspend unused low-privileged accounts that could be leveraged for exploitation
- Review plugin settings for unauthorized modifications and restore from a known-good backup if tampering is identified
Patch Information
Review the Patchstack Vulnerability Advisory for current fix availability. The advisory tracks affected versions through 5.0.2. Apply the patched plugin release through the WordPress plugin management console as soon as it becomes available.
Workarounds
- Deactivate the SiteLock Security plugin on affected sites until a patched version is installed
- Restrict new user registrations and enforce strong role separation to limit who can authenticate to WordPress
- Deploy a Web Application Firewall rule to block requests to vulnerable plugin endpoints from non-administrator sessions
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.