CVE-2026-92619: CWE-269 Improper Privilege Management in wpdevelop Booking Calendar
The Booking Calendar plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 11.8.2 via the `wpbc_ajax_option_save` AJAX action. The vulnerability exists because the `handle_ajax_save()` function applies per-option safeguards only to names explicitly registered via `register_option_policy()`, causing `get_option_policy()` to return an empty policy — bypassing all can_save, force_mode, and allowed_keys checks — for any unregistered option name, including core WordPress options, while an attacker-controlled `data_name` parameter passes through `sanitize_key()` and is written directly to `update_option()` without restriction. This makes it possible for authenticated attackers with Editor-level access and above to escalate their privileges to Administrator by writing core WordPress options such as `default_role=administrator` and `users_can_register=1`, then self-registering a new Administrator account. The nonce check does not meaningfully restrict this attack, as both the nonce value and nonce action are attacker-supplied POST parameters, and a valid nonce is trivially obtainable via `admin-ajax.php?action=rest-nonce`.
AI Analysis
Technical Summary
CVE-2026-92619 describes an improper privilege management vulnerability (CWE-269) in the Booking Calendar plugin for WordPress, affecting all versions up to and including 11.8.2. The issue stems from the `handle_ajax_save()` function applying safeguards only to explicitly registered options, causing unregistered options to bypass permission checks. Attackers with Editor-level privileges can exploit this by sending crafted AJAX requests to `wpbc_ajax_option_save` to update core WordPress options such as `default_role=administrator` and `users_can_register=1`. This enables them to create new Administrator accounts and escalate their privileges. The nonce validation is ineffective because the nonce and nonce action are attacker-controlled parameters, and valid nonces can be trivially obtained via the `rest-nonce` action.
Potential Impact
An authenticated attacker with Editor-level or higher access can escalate their privileges to Administrator by exploiting this vulnerability. This allows them to modify critical WordPress options and create new Administrator accounts, leading to full site compromise. The vulnerability impacts confidentiality, integrity, and availability of the affected WordPress site.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Editor-level access and above to trusted users only. Monitor for suspicious activity related to option changes and user registrations. Avoid exposing the AJAX action to untrusted users. Follow vendor updates closely for patches addressing this issue.
CVE-2026-92619: CWE-269 Improper Privilege Management in wpdevelop Booking Calendar
Description
The Booking Calendar plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 11.8.2 via the `wpbc_ajax_option_save` AJAX action. The vulnerability exists because the `handle_ajax_save()` function applies per-option safeguards only to names explicitly registered via `register_option_policy()`, causing `get_option_policy()` to return an empty policy — bypassing all can_save, force_mode, and allowed_keys checks — for any unregistered option name, including core WordPress options, while an attacker-controlled `data_name` parameter passes through `sanitize_key()` and is written directly to `update_option()` without restriction. This makes it possible for authenticated attackers with Editor-level access and above to escalate their privileges to Administrator by writing core WordPress options such as `default_role=administrator` and `users_can_register=1`, then self-registering a new Administrator account. The nonce check does not meaningfully restrict this attack, as both the nonce value and nonce action are attacker-supplied POST parameters, and a valid nonce is trivially obtainable via `admin-ajax.php?action=rest-nonce`.
CVSS v3.1
Score 7.2high
Affected software
wpdevelop
Booking Calendar
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92619 describes an improper privilege management vulnerability (CWE-269) in the Booking Calendar plugin for WordPress, affecting all versions up to and including 11.8.2. The issue stems from the `handle_ajax_save()` function applying safeguards only to explicitly registered options, causing unregistered options to bypass permission checks. Attackers with Editor-level privileges can exploit this by sending crafted AJAX requests to `wpbc_ajax_option_save` to update core WordPress options such as `default_role=administrator` and `users_can_register=1`. This enables them to create new Administrator accounts and escalate their privileges. The nonce validation is ineffective because the nonce and nonce action are attacker-controlled parameters, and valid nonces can be trivially obtained via the `rest-nonce` action.
Potential Impact
An authenticated attacker with Editor-level or higher access can escalate their privileges to Administrator by exploiting this vulnerability. This allows them to modify critical WordPress options and create new Administrator accounts, leading to full site compromise. The vulnerability impacts confidentiality, integrity, and availability of the affected WordPress site.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Editor-level access and above to trusted users only. Monitor for suspicious activity related to option changes and user registrations. Avoid exposing the AJAX action to untrusted users. Follow vendor updates closely for patches addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-09-16T14:45:02.914Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aace1f555bf5e2cf5a3c691
Added to database: 09/18/2026, 07:02:13 UTC
Last enriched: 09/18/2026, 07:16:31 UTC
Last updated: 09/18/2026, 22:12:51 UTC
Views: 12
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