CVE-2026-15151: Five Star Restaurant Reservations privilege escalation in AJAX notifications handler

CVE-2026-15151 · Severity: high · CVSS 7.5 · Published 2026-08-02

The Five Star Restaurant Reservations WordPress plugin allows low-privilege users to reset critical notification settings without proper authorization. A "Booking Manager" user—who normally cannot access the plugin's settings—can delete all configured booking notification rules, disabling automated customer notifications and disrupting restaurant operations.

Quick answers

Is CVE-2026-15151 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-15151 being exploited in the wild.
How severe is CVE-2026-15151?
High severity, with a CVSS score of 7.5, published 2 August 2026.
Which products and versions are affected?
Five Star Restaurant Reservations Five Star Restaurant Reservations before 2.7.23.
Is there a fix for CVE-2026-15151?
A patch was published on 2026-07-23. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-15151 attacked?
It is attacked over the network.
Am I affected by CVE-2026-15151?
Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The plugin fails to enforce a capability check on the rtb_reset_notifications AJAX action, allowing authenticated users with the "Booking Manager" role to invoke it. Although this role lacks manage_options permissions needed to access the settings UI, the AJAX endpoint validates only the nonce (CSRF token), not user authorization. An attacker with Booking Manager credentials can obtain the nonce from any page they can reach (e.g., the bookings admin page) and submit a POST request to reset all notification rules. This privilege escalation compromises a critical administrative function that controls automated customer communications. The vulnerability was patched in version 2.7.23.

Affected products

  • Five Star Restaurant Reservations Five Star Restaurant Reservations before 2.7.23

Timeline

  • 2026-07-20: disclosed
  • 2026-07-23: patched

References

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