CVE-2026-4100: CWE-862 Missing Authorization in strangerstudios Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions
The Paid Memberships Pro plugin for WordPress is vulnerable to unauthorized modification and disruption of Stripe webhook configuration in all versions up to, and including, 3.6.5. This is due to missing capability checks on the `wp_ajax_pmpro_stripe_create_webhook`, `wp_ajax_pmpro_stripe_delete_webhook`, and `wp_ajax_pmpro_stripe_rebuild_webhook` AJAX handlers. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete, create, or rebuild the site's Stripe webhook, disrupting all payment processing, subscription renewal synchronization, cancellation handling, and failed payment management.
AI Analysis
Technical Summary
CVE-2026-4100 is a missing authorization vulnerability (CWE-862) in the Paid Memberships Pro plugin for WordPress affecting all versions up to 3.6.5. The issue arises from missing capability checks on AJAX handlers related to Stripe webhook management (`wp_ajax_pmpro_stripe_create_webhook`, `wp_ajax_pmpro_stripe_delete_webhook`, and `wp_ajax_pmpro_stripe_rebuild_webhook`). Authenticated users with Subscriber-level privileges or higher can exploit this to alter the site's Stripe webhook configuration, disrupting payment processing and subscription-related functions.
Potential Impact
Exploitation allows authenticated users with low privileges (Subscriber-level) to interfere with Stripe webhook configurations, leading to disruption of payment processing, subscription renewal synchronization, cancellation handling, and failed payment management. This can cause denial of service for payment-related functions but does not directly expose confidential data or allow privilege escalation beyond the webhook disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Subscriber-level user capabilities where possible and monitor for unusual webhook configuration changes. Avoid granting unnecessary authenticated access to untrusted users.
CVE-2026-4100: CWE-862 Missing Authorization in strangerstudios Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions
Description
The Paid Memberships Pro plugin for WordPress is vulnerable to unauthorized modification and disruption of Stripe webhook configuration in all versions up to, and including, 3.6.5. This is due to missing capability checks on the `wp_ajax_pmpro_stripe_create_webhook`, `wp_ajax_pmpro_stripe_delete_webhook`, and `wp_ajax_pmpro_stripe_rebuild_webhook` AJAX handlers. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete, create, or rebuild the site's Stripe webhook, disrupting all payment processing, subscription renewal synchronization, cancellation handling, and failed payment management.
CVSS v3.1
Score 7.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4100 is a missing authorization vulnerability (CWE-862) in the Paid Memberships Pro plugin for WordPress affecting all versions up to 3.6.5. The issue arises from missing capability checks on AJAX handlers related to Stripe webhook management (`wp_ajax_pmpro_stripe_create_webhook`, `wp_ajax_pmpro_stripe_delete_webhook`, and `wp_ajax_pmpro_stripe_rebuild_webhook`). Authenticated users with Subscriber-level privileges or higher can exploit this to alter the site's Stripe webhook configuration, disrupting payment processing and subscription-related functions.
Potential Impact
Exploitation allows authenticated users with low privileges (Subscriber-level) to interfere with Stripe webhook configurations, leading to disruption of payment processing, subscription renewal synchronization, cancellation handling, and failed payment management. This can cause denial of service for payment-related functions but does not directly expose confidential data or allow privilege escalation beyond the webhook disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Subscriber-level user capabilities where possible and monitor for unusual webhook configuration changes. Avoid granting unnecessary authenticated access to untrusted users.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-13T00:23:37.614Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f5e1b7cbff5d8610d4942c
Added to database: 5/2/2026, 11:36:23 AM
Last enriched: 5/10/2026, 2:12:47 AM
Last updated: 6/16/2026, 5:11:19 PM
Views: 66
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