An issue was discovered in Proofpoint Email Protection through 2019-09-08. By collecting scores from Proofpoint email headers, it is possible to build a copy-cat Machine Learning Classification model and extract insights from this model. The insights gathered allow an attacker to craft emails that receive preferable scores, with a goal of delivering malicious emails.

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A file-extension filtering vulnerability in Proofpoint Enterprise Protection (PPS / PoD), in the unpatched versions of PPS through 8.9.22 and 8.14.2 respectively, allows attackers to bypass protection mechanisms (related to extensions, MIME types, virus detection, and journal entries for transmitted files) by sending malformed (not RFC compliant) multipart email.

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Multiple cross-site request forgery (CSRF) vulnerabilities in unspecified administrative modules in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allow remote attackers to hijack the authentication of administrators via unknown vectors.

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An unspecified function in the web interface in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to execute arbitrary commands via unknown vectors, related to a "command injection" issue.

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SQL injection vulnerability in an unspecified function in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to execute arbitrary SQL commands via unknown vectors.

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Directory traversal vulnerability in the web interface in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to read arbitrary files via unspecified vectors.

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The mail-filter web interface in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to bypass authentication via unspecified vectors.

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The embedded MySQL 4.0 server for Proofpoint Protection Server does not require a password for the root user of MySQL, which allows remote attackers to read or modify the backend database.

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