Description
WordPress Plugin Diary & Availability Calendar is prone to an SQL injection vulnerability because it fails to sufficiently sanitize user-supplied data before using it in an SQL query. Exploiting this issue could allow an attacker to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database. WordPress Plugin Diary & Availability Calendar version 1.0.3 is vulnerable; prior versions may also be affected.
Remediation
Edit the source code to ensure that input is properly sanitised or disable the plugin until a fix is available
References
https://codevigilant.com/disclosure/2021/wp-plugin-diary-availability-calendar/
https://wordpress.org/plugins/diary-availability-calendar/#description
Related Vulnerabilities
TYPO3 Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2009-3628)
Python Divide By Zero Vulnerability (CVE-2017-18207)
WordPress Plugin Passster-Password Protection Cross-Site Scripting (3.5.5.7)
WordPress Plugin Newsletter Manager Multiple Cross-Site Scripting Vulnerabilities (1.0.1)