Seppmail: Security Vulnerabilities
SEPPmail Secure Email Gateway before version 15.0.3 does not properly authenticate the inner message of S/MIME-encrypted MIME entities, allowing an attacker to control trusted headers.
CVSS Score
7.8
EPSS Score
0.001
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge security tags using Unicode lookalike characters.
CVSS Score
7.8
EPSS Score
0.001
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to hide security tags from users by crafting a long subject.
CVSS Score
5.3
EPSS Score
0.001
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows attackers with a specially crafted email address to claim another user's PGP signature as their own.
CVSS Score
6.3
EPSS Score
0.0
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows account takeover by abusing GINA account initialization to reset a victim account password.
CVSS Score
7.8
EPSS Score
0.001
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to cause attacker-controlled certificates to be used for future encryption to a victim by adding the certificates to S/MIME signatures.
CVSS Score
7.7
EPSS Score
0.0
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge tags such as [signed OK].
CVSS Score
7.7
EPSS Score
0.001
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to forge a GINA-encrypted email.
CVSS Score
6.3
EPSS Score
0.0
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows attackers with a specially crafted email address to read the contents of emails encrypted for other users.
CVSS Score
4.9
EPSS Score
0.0
Published
2026-04-02
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker with access to a victim's GINA account to bypass a second-password check and read protected emails.
CVSS Score
6.3
EPSS Score
0.0
Published
2026-04-02
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