EUVD-2026-42798
GHSA-937q-4w7r-c9jv
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Network-reachable parameter with no authentication needed (PR:N, AV:N), but AC:H because both a paid Pro license and a specific non-default admin setting must be active; impact is read-only database extraction (C:H, I:N, A:N).
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Booking calendar, Appointment Booking System plugin for WordPress is vulnerable to time-based SQL Injection via the ‘wpdevart_id’ parameter in all versions up to, and including, 3.2.17 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. In order to exploit the vulnerability, the Pro version of the plugin must be installed and activated, with the 'Delete previous dates' option checked.
AnalysisAI
Time-based SQL Injection in the Booking Calendar, Appointment Booking System WordPress plugin (versions ≤ 3.2.17) permits unauthenticated remote attackers to extract sensitive database contents via the 'wpdevart_id' parameter. The flaw exists in main_class.php due to insufficient parameter escaping and unprepared SQL queries, but is only triggerable when the Pro version is installed with the 'Delete previous dates' option enabled - a non-default configuration that meaningfully limits the exposed population. No public exploit code and no CISA KEV listing have been identified at time of analysis; the CVSS 5.9 Medium rating reflects both the high confidentiality impact and the high attack complexity imposed by the conditional prerequisites.
Technical ContextAI
CWE-89 (Improper Neutralization of Special Elements used in an SQL Command) is the root cause. Source code references pinpoint the flaw in the plugin's main_class.php at lines 64, 90, and 91, where the 'wpdevart_id' parameter is concatenated into SQL queries without adequate escaping or parameterized (prepared) statement preparation. The plugin is a PHP-based WordPress extension that interfaces with the WordPress MySQL/MariaDB database to manage booking records. The vulnerable code path belongs to the Pro-tier feature responsible for deleting past booking entries - a feature gated behind both a paid license and an explicit administrator opt-in setting ('Delete previous dates'). The time-based injection technique means the attacker infers data by measuring database response delays rather than reading output directly, making exploitation slower but fully viable.
RemediationAI
Update the Booking Calendar, Appointment Booking System plugin to a version released after 3.2.17; verify the exact patched release number via the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/8c052622-ac99-4069-b7df-41aea303ed9d or the official WordPress plugin repository, as no specific patched version number is confirmed in the available intelligence data. As an immediate compensating control, navigate to the plugin's Pro settings and uncheck the 'Delete previous dates' option - this disables the vulnerable code path entirely with the only trade-off being that old booking records are no longer automatically purged. Deploying a WAF with SQL injection rule sets (such as Wordfence's own firewall for WordPress) can detect and block time-based injection attempts against this parameter as an additional layer while awaiting the patch.
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Same weakness CWE-89 – SQL Injection
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External POC / Exploit Code
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