Apache James Vulnerable to SMTP Smuggling

CVE-2023-51747

What is CVE-2023-51747?

A vulnerability in Apache James prior to versions 3.8.1 and 3.7.5 exposes users to SMTP smuggling attacks. This issue arises from lenient line delimiter handling, leading to discrepancies in how messages are interpreted by senders and receivers. Attackers can exploit this flaw to manipulate SMTP envelopes, potentially allowing them to bypass SPF checks and deliver spoofed emails. It is crucial for users to upgrade to the patched versions to ensure protection against these vulnerabilities.

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