SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8504-1 advisory.

    It was discovered that SOGo did not properly sanitize categories used for events, tasks, and contacts. A     remote authenticated attacker could possibly use this issue to perform cross-site scripting attacks. This     issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 26.04 LTS.
    (CVE-2025-71276)

    It was discovered that SOGo did not properly sanitize the hint query parameter. A remote attacker could     possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 26.04     LTS. (CVE-2026-3054)

    It was discovered that SOGo did not renew the one-time password when a user disabled and re-enabled it,     and used a shorter length than recommended. A remote attacker could possibly use this issue to bypass     authentication. This issue only affected Ubuntu 22.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-33550)

    It was discovered that SOGo did not properly use the SQL adaptor for the user source, resulting in SQL     injection when certain databases were used. A remote authenticated attacker could possibly use this issue     to obtain sensitive information or execute arbitrary SQL commands. (CVE-2026-46445, CVE-2026-46446)

    It was discovered that SOGo did not properly sanitize mail containing ICS calendar invitations. A remote     attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected     Ubuntu 26.04 LTS. (CVE-2026-8496)

    It was discovered that SOGo did not properly validate identifiers when managing access control lists. A     remote authenticated attacker could possibly use this issue to perform SQL injection attacks and obtain     sensitive information. (CVE-2026-8851)

    It was discovered that SOGo did not properly sanitize the theme parameter. A remote attacker could     possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu 18.04     LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2025-63499)

    It was discovered that SOGo did not properly sanitize the userName parameter on the login page. A remote     attacker could possibly use this issue to perform cross-site scripting attacks. This issue only affected     Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2025-63498)

    It was discovered that SOGo did not properly sanitize attachments when previewing them. A remote attacker     could possibly use this issue to perform cross-site scripting attacks. This issue only affected Ubuntu     16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2024-34462)

    It was discovered that SOGo did not validate the signatures of SAML assertions it received when SAML was     used for authentication. A remote attacker could possibly use this issue to impersonate other users. This     issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-33054)

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

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML     assertions it receives. Any actor with network access to the deployment could impersonate users when SAML     is the authentication method. (Only versions after 2.0.5a are affected.) (CVE-2021-33054)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 10 / 11 host has packages installed that are affected by a vulnerability as referenced in the dsa-5029 advisory.

    It was discovered that missing SAML signature validation in the SOGo groupware could result in     impersonation attacks. For the oldstable distribution (buster), this problem has been fixed in version     4.0.7-1+deb10u2. For the stable distribution (bullseye), this problem has been fixed in version     5.0.1-4+deb11u1. We recommend that you upgrade your sogo packages. For the detailed security status of     sogo please refer to its security tracker page at: https://security-tracker.debian.org/tracker/sogo

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

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

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2707 advisory.

  - SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML     assertions it receives. Any actor with network access to the deployment could impersonate users when SAML     is the authentication method. (Only versions after 2.0.5a are affected.) (CVE-2021-33054)

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

sogo.nu reports :

SOGo was not validating the signatures of any SAML assertions it received.

This means any actor with network access to the deployment could impersonate

users when SAML was the authentication method.

ID	Name	Product	Family	Severity
325422	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 26.04 LTS : SOGo vulnerabilities (USN-8504-1)	Nessus	Ubuntu Local Security Checks	high
246906	Linux Distros Unpatched Vulnerability : CVE-2021-33054	Nessus	Misc.	high
156259	Debian DSA-5029-1 : sogo - security update	Nessus	Debian Local Security Checks	high
151516	Debian DLA-2707-1 : sogo - LTS security update	Nessus	Debian Local Security Checks	high
150317	FreeBSD : SOGo -- SAML user authentication impersonation (69815a1d-c31d-11eb-9633-b42e99a1b9c3)	Nessus	FreeBSD Local Security Checks	high

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CVE-2021-33054

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