Description
WordPress Plugin WP smart CRM & Invoices FREE is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. WordPress Plugin WP smart CRM & Invoices FREE version 1.8.7 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://zeroaptitude.com/misha/wordpress-plugin-bug-hunting-part-2/
https://wordpress.org/plugins/wp-smart-crm-invoices-free/#description
Related Vulnerabilities
WordPress Use of a Broken or Risky Cryptographic Algorithm Vulnerability (CVE-2007-6013)
PHP Other Vulnerability (CVE-2006-1017)
WordPress Plugin Fusion:Extension-Gallery Multiple Unspecified Vulnerabilities (1.0.4)
WordPress Plugin P3 (Plugin Performance Profiler) Cross-Site Scripting (1.5.3.8)
WordPress Plugin underConstruction Cross-Site Scripting (1.18)