СleanTalk - Anti-Spam Protection — Vulnerabilities & Security Advisories 3

CleanTalk provides anti-spam protection for websites and applications, focusing on comment and form spam prevention. Historically, the service has been associated with multiple cross-site scripting (XSS) vulnerabilities, which allowed attackers to inject malicious scripts into web pages. One critical remote code execution (RCE) vulnerability was also identified, enabling unauthorized system access. These vulnerabilities primarily stemmed from improper input validation and insufficient sanitization of user-supplied data. While no major public security incidents have been widely reported, the presence of three CVEs indicates ongoing security challenges that require regular updates and careful implementation to maintain effective protection against evolving threats.