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

  - Alertmanager handles alerts sent by client applications such as the Prometheus server. An attacker with
    the permission to perform POST requests on the /api/v1/alerts endpoint could be able to execute arbitrary
    JavaScript code on the users of Prometheus Alertmanager. This issue has been fixed in Alertmanager version
    0.2.51. (CVE-2023-40577)

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

  - Alertmanager handles alerts sent by client applications such as the Prometheus server. An attacker with     the permission to perform POST requests on the /api/v1/alerts endpoint could be able to execute arbitrary     JavaScript code on the users of Prometheus Alertmanager. This issue has been fixed in Alertmanager version     0.2.51. (CVE-2023-40577)

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

The remote SUSE Linux SLES15 / openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2024:0512-1 advisory.

    golang-github-prometheus-alertmanager was updated from version 0.23.0 to 0.26.0 (jsc#PED-7353):

    - Version 0.26.0:
      * Security fixes:
        -  CVE-2023-40577: Fix stored XSS via the /api/v1/alerts endpoint in the Alertmanager UI (bsc#1218838)

Tenable has extracted the preceding description block directly from the SUSE 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 version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2024:0822 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2023-40577:
    Alertmanager handles alerts sent by client applications such as the Prometheus server. An attacker with     the permission to perform POST requests on the /api/v1/alerts endpoint could be able to execute arbitrary     JavaScript code on the users of Prometheus Alertmanager. This issue has been fixed in Alertmanager version     0.2.51.

Tenable has extracted the preceding description block directly from the Tencent Linux 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 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3609 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3609-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                    Bastien Roucaries     October 08, 2023                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : prometheus-alertmanager     Version        : 0.15.3+ds-3+deb10u1     CVE ID         : CVE-2023-40577     Debian Bug     : 1050558

    prometheus-alertmanager package, a component of Prometheus,     an application used for event monitoring and alerting,     was vulnerable to stored XSS type attack.

    Alertmanager handles alerts sent by client applications such as the     Prometheus server. An attacker with the permission to perform POST     requests on the /api/v1/alerts endpoint could be able to execute     arbitrary JavaScript code on the users of Prometheus Alertmanager.

    For Debian 10 buster, this problem has been fixed in version     0.15.3+ds-3+deb10u1.

    We recommend that you upgrade your prometheus-alertmanager packages.

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

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

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 Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6935-1 advisory.

    It was discovered that prometheus-alertmanager didn't properly sanitize

    input it received through an API endpoint. An attacker with permission to

    send requests to this endpoint could potentially inject arbitrary code.

    On Ubuntu 20.04 LTS and Ubuntu 22.04 LTS, this vulnerability is only

    present if the UI has been explicitly activated.

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

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

ID	Name	Product	Family	Published	Updated	Severity
408060	Alpine: multiple alertmanager packages: security update to 0.26.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	12/7/2023	7/2/2026	medium
419186	SCA: security update for github.com/prometheus/alertmanager (GHSA-v86x-5fm3-5p7j)	Tenable Cloud Security	SCA Checks	1/23/2025	7/2/2026	medium
408060	Alpine: multiple alertmanager packages: security update to 0.26.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	12/7/2023	7/2/2026	medium
419186	SCA: security update for github.com/prometheus/alertmanager (GHSA-v86x-5fm3-5p7j)	Tenable Self-Hosted Container Security	SCA Checks	1/23/2025	7/2/2026	medium
226723	Linux Distros Unpatched Vulnerability : CVE-2023-40577	Nessus	Misc.	3/5/2025	7/25/2026	medium
190623	SUSE SLES15 / openSUSE 15 Security Update : golang-github-prometheus-alertmanager (SUSE-SU-2024:0512-1)	Nessus	SuSE Local Security Checks	2/17/2024	6/25/2026	medium
240046	TencentOS Server 4: alertmanager (TSSA-2024:0822)	Nessus	Tencent Local Security Checks	6/16/2025	12/4/2025	medium
182760	Debian dla-3609 : golang-github-prometheus-alertmanager-dev - security update	Nessus	Debian Local Security Checks	10/8/2023	1/22/2025	medium
204925	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Prometheus Alertmanager vulnerability (USN-6935-1)	Nessus	Ubuntu Local Security Checks	7/31/2024	8/27/2024	medium

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