SMTP Header Injection Vulnerability in Apache Commons Email by Apache
CVE-2017-9801

7.5HIGH

Key Information:

Vendor: Apache
Status: Apache Commons Email
Vendor: CVE Published:; 7 August 2017

What is CVE-2017-9801?

This vulnerability in Apache Commons Email versions 1.0 to 1.4 allows an attacker to inject arbitrary SMTP headers by exploiting line breaks in the email subject. When a call-site passes a subject containing line breaks, it can alter the email structure and introduce harmful headers, potentially leading to unauthorized actions, spam, or information leakage.

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