CVE-2026-17587 Overview
CVE-2026-17587 is a missing authorization vulnerability [CWE-862] affecting the My Agile Privacy® – CMP, Cookie Consent & Privacy Tools plugin for WordPress. All versions up to and including 3.3.6 fail to verify that a requesting user is authorized to modify plugin settings. Unauthenticated attackers can send crafted requests to alter values stored in the plugin's settings key, including missing_cookie_shield, cookie_shield_running, cmode_v2_js_on_error, cmode_v2_js_error_code, and cmode_v2_js_error_motivation. The flaw enables tampering with consent management configuration without any credentials.
Critical Impact
Unauthenticated attackers can modify cookie consent and privacy plugin settings on affected WordPress sites, undermining the integrity of consent management data.
Affected Products
- My Agile Privacy® – CMP, Cookie Consent & Privacy Tools plugin for WordPress
- All plugin versions up to and including 3.3.6
- WordPress sites running the vulnerable plugin
Discovery Timeline
- 2026-08-25 - CVE-2026-17587 published to NVD
- 2026-08-26 - Last updated in NVD database
Technical Details for CVE-2026-17587
Vulnerability Analysis
The plugin exposes several action handlers that update entries in the plugin's WordPress options settings key. These handlers process requests without checking capabilities, nonces, or user authentication state. As a result, any unauthenticated visitor can invoke the handlers over the network and change stored configuration values. The impacted settings include missing_cookie_shield, cookie_shield_running, cmode_v2_js_on_error, cmode_v2_js_error_code, and cmode_v2_js_error_motivation, which govern parts of the cookie shielding and consent JavaScript error tracking behavior.
The issue is scoped to integrity of plugin settings. It does not directly expose confidential data or take a site offline, but it can silently degrade privacy compliance posture and disrupt consent enforcement.
Root Cause
The root cause is a missing authorization check [CWE-862] in the frontend request handlers of the plugin. The vulnerable code paths are located in frontend/my-agile-privacy-frontend.php and includes/my-agile-privacy-class.php at the referenced source lines. The handlers accept parameters and persist them into the plugin's stored settings option without invoking current_user_can(), check_ajax_referer(), or an equivalent capability and nonce check.
Attack Vector
Exploitation is remote and requires no authentication, privileges, or user interaction. An attacker sends a crafted HTTP request to the WordPress site targeting the exposed frontend endpoint. The request supplies attacker-controlled values for one or more of the vulnerable settings fields. The plugin writes those values into the settings option in the database. Repeat requests can toggle shielding state or inject arbitrary strings into the JavaScript error tracking fields stored in configuration.
No verified exploit code is publicly available at the time of publication. Refer to the Wordfence Vulnerability Analysis and the WordPress ChangeSet Update for the exact code paths.
Detection Methods for CVE-2026-17587
Indicators of Compromise
- Unexpected changes to the My Agile Privacy plugin option row in the wp_options table, particularly modifications to missing_cookie_shield or cookie_shield_running values.
- Anomalous string content in cmode_v2_js_on_error, cmode_v2_js_error_code, or cmode_v2_js_error_motivation settings.
- HTTP requests from unauthenticated sources hitting plugin frontend endpoints with parameters that map to the vulnerable settings names.
Detection Strategies
- Review web server access logs for POST or GET requests referencing the plugin's frontend action names with parameters matching the affected settings fields.
- Compare the current plugin settings option in the database against a known-good baseline.
- Enable WordPress audit logging to record changes to the plugin's option row and alert on modifications from unauthenticated sessions.
Monitoring Recommendations
- Monitor for spikes in requests to /wp-admin/admin-ajax.php and to plugin frontend PHP endpoints originating from unauthenticated clients.
- Alert on any write to the plugin's settings key that does not correlate with an authenticated administrator session.
- Track plugin version inventory across all WordPress instances and flag any site still running version 3.3.6 or earlier.
How to Mitigate CVE-2026-17587
Immediate Actions Required
- Update the My Agile Privacy® plugin to a version later than 3.3.6 that includes the fix referenced in the plugin ChangeSet.
- Audit the plugin settings option in the database and restore any tampered values from a trusted backup.
- Restrict access to WordPress frontend endpoints using a Web Application Firewall (WAF) rule that blocks unauthenticated requests carrying the affected parameter names.
Patch Information
The vendor addressed the missing authorization check in a subsequent release, tracked in the WordPress ChangeSet Update. Administrators should upgrade the plugin through the WordPress plugin manager or by deploying the fixed release from the plugin repository. Verify after upgrade that the installed version is greater than 3.3.6.
Workarounds
- Deactivate the My Agile Privacy plugin until the patched version is deployed.
- Deploy WAF rules that block requests to the vulnerable frontend handlers when the request lacks a valid authenticated session cookie.
- Limit access to WordPress admin and AJAX endpoints by source IP where operationally feasible.
# Configuration example: WordPress CLI upgrade of the affected plugin
wp plugin update myagileprivacy
wp plugin get myagileprivacy --field=version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
