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    CVE-2021-31739

    The SEPPmail solution is vulnerable to a Cross-Site Scripting vulnerability (XSS), because user input is not correctly encoded in HTML attributes when returned by the server.SEPPmail 11.1.10 allows XSS via a recipient address.

    Published:Nov 18, 2022
    Last Modified:Apr 29, 2025
    EPS:Nov 18, 2022
    EPSS Score:0.00096
    CVSS Score:6.1

    Affected Products

    Vendor
    Seppmail
    Product
    Seppmail

    Exploits

    https://www.pentagrid.ch/en/blog/multiple-vulnerabilities-in-seppmail/https://www.pentagrid.ch/en/blog/multiple-vulnerabilities-in-seppmail/

    Related CVEs

    CVE-2026-2743 (CVSS 10) — Arbitrary File Write via Path Traversal upload to Remote Code Execution in SeppMail User Web Interface. The af…
    CVE-2026-27441 (CVSS 9.5) — SEPPmail Secure Email Gateway before version 15.0.1 insufficiently neutralizes the PDF encryption password, al…
    CVE-2026-2748 (CVSS 7.8) — SEPPmail Secure Email Gateway before version 15.0.1 improperly validates S/MIME certificates issued for email …
    CVE-2026-27442 (CVSS 9.3) — The GINA web interface in SEPPmail Secure Email Gateway before version 15.0.1 does not properly check attachme…
    CVE-2026-27445 (CVSS 6.9) — SEPPmail Secure Email Gateway before version 15.0.1 does not properly verify that a PGP signature was generate…
    CVE-2026-27444 (CVSS 7.8) — SEPPmail Secure Email Gateway before version 15.0.1 incorrectly interprets email addresses in the email header…
    CVE-2026-2747 (CVSS 6.9) — SEPPmail Secure Email Gateway before version 15.0.1 decrypts inline PGP messages without isolating them from s…
    CVE-2026-27443 (CVSS 8.2) — SEPPmail Secure Email Gateway before version 15.0.1 does not properly sanitize the headers from S/MIME protect…
    CVE-2026-2746 (CVSS 6.9) — SEPPmail Secure Email Gateway before version 15.0.1 does not properly communicate PGP signature verification r…
    CVE-2022-41871 (CVSS 6) — SEPPmail through 12.1.17 allows command injection within the Admin Portal. An authenticated attacker is able t…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High