MODX Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2017-7320
setup/controllers/language.php in MODX Revolution 2.5.4-pl and earlier does not properly constrain the language parameter which allows remote attackers to conduct Cookie-Bombing attacks and cause a denial of service (cookie quota exhaustion) or conduct HTTP Response Splitting attacks with resultant XSS via an invalid parameter value.