This vulnerability in AcyMailing SMTP Newsletter (versions before 9.11.1) involves improper neutralization of input during web page generation, leading to reflected cross-site scripting (XSS). An attacker can craft a malicious link that, when visited by a user, executes arbitrary scripts in the context of the affected web application. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction needed, and impacts on confidentiality, integrity, and availability. No patch or mitigation details are provided in the source data.

Successful exploitation could allow an attacker to execute arbitrary scripts in the victim's browser, potentially leading to information disclosure, session hijacking, or other impacts on confidentiality, integrity, and availability of the affected system. The vulnerability affects all users who interact with the vulnerable web interface and follow a maliciously crafted link.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with links and inputs related to AcyMailing SMTP Newsletter. No vendor-provided mitigation or temporary fix information is available in the provided data.