GHSA-V5C9-MMW9-829Q PHPMailer susceptible to arbitrary code execution

html2text.php in Chuggnutt HTML to Text Converter, as used in PHPMailer before 5.2.10, RoundCube Webmail roundcubemail 0.2-1.alpha and 0.2-3.beta, Mahara, and AtMail Open 1.03, allows remote attackers to execute arbitrary code via crafted input that is processed by the pregreplace function with t...