The-Login

**Name of the Vulnerable Software and Affected Versions** aiosmtpd versions prior to 1.4.5 **Description** aiosmtpd is vulnerable to inbound SMTP smuggling, a novel vulnerability based on interpretation differences of the SMTP protocol. By exploiting this issue, an attacker may send spoofed e-mails with fake sender addresses, allowing advanced phishing attacks. This issue also exists in other SMTP software like Postfix. With the right SMTP server constellation, an attacker can send spoofed e-mails to inbound/receiving aiosmtpd instances. **Recommendations** For versions prior to 1.4.5, upgrade to version 1.4.5 or later to address the issue. As a temporary workaround, consider restricting access to the SMTP server to minimize the risk of exploitation. There are no known workarounds for this vulnerability.