The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6196 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6196-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     April 04, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : roundcube     CVE ID         : CVE-2026-35537 CVE-2026-35538 CVE-2026-35539 CVE-2026-35540                      CVE-2026-35541 CVE-2026-35542 CVE-2026-35543 CVE-2026-35544                      CVE-2026-35545     Debian Bug     : 1131182 1132268

    Multiple vulnerabilities were discovered in roundcube, a skinnable AJAX     based webmail solution for IMAP servers, which could result in     information disclosure, IMAP injection, CSRF bypass, bypass of remote     image blocking, cross-site scripting, access control bypass, or     privilege escalation.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 1.6.5+dfsg-1+deb12u8.

    For the stable distribution (trixie), these problems have been fixed in     version 1.6.15+dfsg-0+deb13u1.

    We recommend that you upgrade your roundcube packages.

    For the detailed security status of roundcube please refer to its     security tracker page at:
    https://security-tracker.debian.org/tracker/roundcube

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Debian dsa-6196 : roundcube - security update

high Nessus Plugin ID 305020

Version 1.3