There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions
    it may be possible for a deactivated user to login when using uncommon configurations. This only applies
    if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled`
    configuration setting. 2. The local password database is enabled via the `password_config.enabled` and
    `password_config.localdb_enabled` configuration settings *and* a user's password is updated via an admin
    API after a user is deactivated. Note that the local password database is enabled by default, but it is
    uncommon to set a user's password after they've been deactivated. Installations that are configured to
    only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external
    password provider (e.g. LDAP) are not affected. If not using JSON Web Tokens, ensure that deactivated
    users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to
    upgrade. (CVE-2023-32682)

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions
    it may be possible for a deactivated user to login when using uncommon configurations. This only applies
    if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled`
    configuration setting. 2. The local password database is enabled via the `password_config.enabled` and
    `password_config.localdb_enabled` configuration settings *and* a user's password is updated via an admin
    API after a user is deactivated. Note that the local password database is enabled by default, but it is
    uncommon to set a user's password after they've been deactivated. Installations that are configured to
    only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external
    password provider (e.g. LDAP) are not affected. If not using JSON Web Tokens, ensure that deactivated
    users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to
    upgrade. (CVE-2023-32682)

  - Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed
    or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request
    forgery or bypassing network policies. Impact is limited to IP addresses allowed by the
    `url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited
    information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON
    response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image
    response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or
    have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in
    version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.
    (CVE-2023-32683)

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-56760afca8 advisory.

    Update to v1.85.2

    ----

    Update to v1.85.1

    ----

    Update to v1.85.0     Fixes CVE-2023-32682, CVE-2023-32683

    ----

    Update to v1.84.1


Tenable has extracted the preceding description block directly from the Fedora 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.

  - Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions     it may be possible for a deactivated user to login when using uncommon configurations. This only applies     if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled`     configuration setting. 2. The local password database is enabled via the `password_config.enabled` and     `password_config.localdb_enabled` configuration settings *and* a user's password is updated via an admin     API after a user is deactivated. Note that the local password database is enabled by default, but it is     uncommon to set a user's password after they've been deactivated. Installations that are configured to     only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external     password provider (e.g. LDAP) are not affected. If not using JSON Web Tokens, ensure that deactivated     users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to     upgrade. (CVE-2023-32682)

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

ID	Name	Product	Family	Published	Updated	Severity
408733	SCA: security update for matrix-synapse (GHSA-26c5-ppr8-f33p)	Tenable Self-Hosted Container Security	SCA Checks	1/23/2025	7/2/2026	medium
426533	Alpine: multiple synapse packages: security update to 1.85.1-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	5/16/2025	7/2/2026	medium
408733	SCA: security update for matrix-synapse (GHSA-26c5-ppr8-f33p)	Tenable Cloud Security	SCA Checks	1/23/2025	7/2/2026	medium
426533	Alpine: multiple synapse packages: security update to 1.85.1-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	5/16/2025	7/2/2026	medium
177402	Fedora 38 : matrix-synapse (2023-56760afca8)	Nessus	Fedora Local Security Checks	6/16/2023	11/14/2024	medium
256419	Linux Distros Unpatched Vulnerability : CVE-2023-32682	Nessus	Misc.	8/27/2025	8/11/2026	medium

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