Appointment Booking Calendar Plugin up to 1.6.9.5 on WordPress hash information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Appointment Booking Calendar Plugin up to 1.6.9.5 on WordPress. This impacts the function hash. The manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2025-11723. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Appointment Booking Calendar Plugin up to 1.6.9.5 on WordPress and classified as problematic. This issue affects the function hash. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.5 via the hash() function due to use of a hardcoded fall-back salt. This makes it possible for unauthenticated attackers to generate a valid token across sites running the plugin that have not manually set a salt in the wp-config.php file and access booking information that will allow them to make modifications.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2025-11723. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Appointment Software

Name

• Appointment Booking Calendar Plugin

Version

• 1.6.9.0
• 1.6.9.1
• 1.6.9.2
• 1.6.9.3
• 1.6.9.4
• 1.6.9.5

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