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202 vulnerabilities found for checkmk by checkmk

CVE-2026-33457 (GCVE-0-2026-33457)

Vulnerability from nvd – Published: 2026-04-10 08:31 – Updated: 2026-04-14 13:29
VLAI?
Title
Potential livestatus injection in prediction graph page
Summary
Livestatus injection in the prediction graph page in Checkmk <2.5.0b4, <2.4.0p26, and <2.3.0p47 allows an authenticated user to inject arbitrary Livestatus commands via a crafted service name parameter due to insufficient sanitization of the service description value.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-140 - Improper Neutralization of Delimiters
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0b4 (semver)
Affected: 2.4.0 , < 2.4.0p26 (semver)
Affected: 2.3.0 , < 2.3.0p47 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33456 (GCVE-0-2026-33456)

Vulnerability from nvd – Published: 2026-04-10 08:31 – Updated: 2026-04-14 13:29
VLAI?
Title
Potential livestatus injection in notification test
Summary
Livestatus injection in the notification test mode in Checkmk <2.5.0b4 and <2.4.0p26 allows an authenticated user with access to the notification test page to inject arbitrary Livestatus commands via a crafted service description.
Severity ?
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-140 - Improper Neutralization of Delimiters
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0b4 (semver)
Affected: 2.4.0 , < 2.4.0p26 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33455 (GCVE-0-2026-33455)

Vulnerability from nvd – Published: 2026-04-10 08:30 – Updated: 2026-04-14 13:30
VLAI?
Title
Livestatus injection in monitoring quicksearch
Summary
Livestatus injection in the monitoring quicksearch in Checkmk <2.5.0b4 allows an authenticated attacker to inject livestatus commands via the search query due to insufficient input sanitization in search filter plugins.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-140 - Improper Neutralization of Delimiters
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0b4 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-3466 (GCVE-0-2026-3466)

Vulnerability from nvd – Published: 2026-04-07 12:08 – Updated: 2026-04-22 12:26
VLAI?
Title
Cross-site scripting in dashlet title
Summary
Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.
Severity ?
8.5 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.2.0 (semver)
Affected: 2.3.0 , < 2.3.0p46 (semver)
Affected: 2.4.0 , < 2.4.0p25 (semver)
Affected: 2.5.0b1 , < 2.5.0 (semver)
Create a notification for this product.
Credits
Alex Williams (Pellera Technologies)
Show details on NVD website
To clipboard 

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CVE-2025-39666 (GCVE-0-2025-39666)

Vulnerability from nvd – Published: 2026-04-07 12:09 – Updated: 2026-04-07 13:18
VLAI?
Title
omd: Local privilege escalation when executing omd commands as root
Summary
Local privilege escalation in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows a site user to escalate their privileges to root, by manipulating files in the site context that are processed when the `omd` administrative command is run by root.
Severity ?
9.3 (Critical)
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE
  • CWE-426 - Untrusted Search Path
  • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.2.0 (semver)
Affected: 2.3.0 , < 2.3.0p46 (semver)
Affected: 2.4.0 , < 2.4.0p25 (semver)
Affected: 2.5.0b1 , < 2.5.0b3 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-24096 (GCVE-0-2026-24096)

Vulnerability from nvd – Published: 2026-04-01 10:07 – Updated: 2026-04-01 12:37
VLAI?
Title
Insufficient permission validation on multiple REST API Quick Setup endpoints
Summary
Insufficient permission validation on multiple REST API Quick Setup endpoints in Checkmk 2.5.0 (beta) before version 2.5.0b2 and 2.4.0 before version 2.4.0p25 allows low-privileged users to perform unauthorized actions or obtain sensitive information
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0b1 , < 2.5.0b2 (semver)
Affected: 2.4.0 , < 2.4.0p25 (semver)
Create a notification for this product.
Credits
PS Positive Security GmbH
Show details on NVD website
To clipboard 

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CVE-2026-33276 (GCVE-0-2026-33276)

Vulnerability from nvd – Published: 2026-03-31 13:44 – Updated: 2026-03-31 15:45
VLAI?
Title
XSS in Unified Search via Unescaped Host/Service Names
Summary
Stored cross-site scripting (XSS) in Checkmk 2.5.0 (beta) before 2.5.0b2 allows authenticated users with permission to create hosts or services to execute arbitrary JavaScript in the browsers of other users performing searches in the Unified Search feature.
Severity ?
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0b1 , < 2.5.0b2 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-20915 (GCVE-0-2026-20915)

Vulnerability from nvd – Published: 2026-03-31 13:51 – Updated: 2026-03-31 17:15
VLAI?
Title
Stored cross-site scripting in Pending Changes sidebar
Summary
Stored cross-site scripting (XSS) in Checkmk version 2.5.0 (beta) before 2.5.0b2 allows authenticated users with permission to create pending changes to inject malicious JavaScript into the Pending Changes sidebar, which will execute in the browsers of other users viewing the sidebar.
Severity ?
8.5 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0b1 , < 2.5.0b2 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-2859 (GCVE-0-2026-2859)

Vulnerability from nvd – Published: 2026-03-13 09:40 – Updated: 2026-03-13 15:48
VLAI?
Title
Unauthenticated Host Enumeration via Observable Response Discrepancy on Deploy Agent Endpoint
Summary
Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows unauthenticated users to enumerate existing hosts by observing different HTTP response codes in deploy_agent endpoint, which could lead to information disclosure.
Severity ?
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p23 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Affected: 2.2.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-24097 (GCVE-0-2026-24097)

Vulnerability from nvd – Published: 2026-03-13 09:40 – Updated: 2026-03-13 15:56
VLAI?
Title
Authenticated Host Enumeration via Observable Response Discrepancy on Agent Register Existing Endpoint
Summary
Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows authenticated users to enumerate existing hosts by observing different HTTP response codes in agent-receiver/register_existing endpoint, which could lead to information disclosure.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p23 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Affected: 2.2.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-3103 (GCVE-0-2026-3103)

Vulnerability from nvd – Published: 2026-03-04 13:15 – Updated: 2026-03-04 14:07
VLAI?
Title
Deletion of passwords via RestApi
Summary
A logic error in the remove_password() function in Checkmk GmbH's Checkmk versions <2.4.0p23, <2.3.0p43, and 2.2.0 (EOL) allows a low-privileged user to cause data loss.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p23 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Affected: 2.2.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-64999 (GCVE-0-2025-64999)

Vulnerability from nvd – Published: 2026-02-26 10:26 – Updated: 2026-04-14 14:28
VLAI?
Title
Cross-site scripting in HTML logs of Synthetic Monitoring test services
Summary
Improper neutralization of input in Checkmk versions 2.4.0 before 2.4.0p22, and 2.3.0 before 2.3.0p43 allows an attacker that can manipulate a host's check output to inject malicious JavaScript into the Synthetic Monitoring HTML logs, which can then be accessed via a crafted phishing link.
Severity ?
7.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p22 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Create a notification for this product.
Credits
Lisa Gnedt (SBA Research)
Show details on NVD website
To clipboard 

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CVE-2025-65000 (GCVE-0-2025-65000)

Vulnerability from nvd – Published: 2025-12-18 14:04 – Updated: 2025-12-18 15:28
VLAI?
Title
Exposure of SSH Private Keys in Remote Alert Handlers (Linux) Rule
Summary
SSH private keys of the "Remote alert handlers (Linux)" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0. This potentially allowed unauthorized triggering of predefined alert handlers on hosts where the handler was deployed.
Severity ?
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:L
CWE
  • CWE-212 - Improper Removal of Sensitive Information Before Storage or Transfer
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p18 (semver)
Affected: 2.3.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-64997 (GCVE-0-2025-64997)

Vulnerability from nvd – Published: 2025-12-18 09:11 – Updated: 2025-12-18 14:27
VLAI?
Title
Insufficient permission validation when showing agent information
Summary
Insufficient permission validation in Checkmk versions prior to 2.4.0p17 and 2.3.0p42 allow low-privileged users to view agent information via the REST API, which could lead to information disclosure.
Severity ?
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p17 (semver)
Affected: 2.3.0 , < 2.3.0p42 (semver)
Create a notification for this product.
Credits
PS Positive Security GmbH
Show details on NVD website
To clipboard 

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CVE-2025-64996 (GCVE-0-2025-64996)

Vulnerability from nvd – Published: 2025-11-18 15:10 – Updated: 2025-11-18 21:23
VLAI?
Title
Overly broad file permissions in the mk_inotify plugin allows reading and manipulating the plugin's output
Summary
In Checkmk versions prior to 2.4.0p16, 2.3.0p41, and all versions of 2.2.0 and older, the mk_inotify plugin creates world-readable and writable files, allowing any local user on the system to read the plugin's output and manipulate it, potentially leading to unauthorized access to or modification of monitoring data.
Severity ?
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N
CWE
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p16 (semver)
Affected: 2.3.0 , < 2.3.0p41 (semver)
Affected: 2.2.0 (semver)
Affected: 2.1.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-58122 (GCVE-0-2025-58122)

Vulnerability from nvd – Published: 2025-11-18 15:11 – Updated: 2025-11-18 21:33
VLAI?
Title
Insufficient permission validation when configuring notification parameters
Summary
Insufficient permission validation in Checkmk 2.4.0 before version 2.4.0p16 allows low-privileged users to modify notification parameters via the REST API, which could lead to unauthorized actions or information disclosure.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p16 (semver)
Create a notification for this product.
Credits
PS Positive Security GmbH
Show details on NVD website
To clipboard 

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CVE-2026-33457 (GCVE-0-2026-33457)

Vulnerability from cvelistv5 – Published: 2026-04-10 08:31 – Updated: 2026-04-14 13:29
VLAI?
Title
Potential livestatus injection in prediction graph page
Summary
Livestatus injection in the prediction graph page in Checkmk <2.5.0b4, <2.4.0p26, and <2.3.0p47 allows an authenticated user to inject arbitrary Livestatus commands via a crafted service name parameter due to insufficient sanitization of the service description value.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-140 - Improper Neutralization of Delimiters
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0b4 (semver)
Affected: 2.4.0 , < 2.4.0p26 (semver)
Affected: 2.3.0 , < 2.3.0p47 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33456 (GCVE-0-2026-33456)

Vulnerability from cvelistv5 – Published: 2026-04-10 08:31 – Updated: 2026-04-14 13:29
VLAI?
Title
Potential livestatus injection in notification test
Summary
Livestatus injection in the notification test mode in Checkmk <2.5.0b4 and <2.4.0p26 allows an authenticated user with access to the notification test page to inject arbitrary Livestatus commands via a crafted service description.
Severity ?
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-140 - Improper Neutralization of Delimiters
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0b4 (semver)
Affected: 2.4.0 , < 2.4.0p26 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33455 (GCVE-0-2026-33455)

Vulnerability from cvelistv5 – Published: 2026-04-10 08:30 – Updated: 2026-04-14 13:30
VLAI?
Title
Livestatus injection in monitoring quicksearch
Summary
Livestatus injection in the monitoring quicksearch in Checkmk <2.5.0b4 allows an authenticated attacker to inject livestatus commands via the search query due to insufficient input sanitization in search filter plugins.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-140 - Improper Neutralization of Delimiters
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0 , < 2.5.0b4 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-39666 (GCVE-0-2025-39666)

Vulnerability from cvelistv5 – Published: 2026-04-07 12:09 – Updated: 2026-04-07 13:18
VLAI?
Title
omd: Local privilege escalation when executing omd commands as root
Summary
Local privilege escalation in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows a site user to escalate their privileges to root, by manipulating files in the site context that are processed when the `omd` administrative command is run by root.
Severity ?
9.3 (Critical)
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE
  • CWE-426 - Untrusted Search Path
  • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.2.0 (semver)
Affected: 2.3.0 , < 2.3.0p46 (semver)
Affected: 2.4.0 , < 2.4.0p25 (semver)
Affected: 2.5.0b1 , < 2.5.0b3 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-3466 (GCVE-0-2026-3466)

Vulnerability from cvelistv5 – Published: 2026-04-07 12:08 – Updated: 2026-04-22 12:26
VLAI?
Title
Cross-site scripting in dashlet title
Summary
Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.
Severity ?
8.5 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.2.0 (semver)
Affected: 2.3.0 , < 2.3.0p46 (semver)
Affected: 2.4.0 , < 2.4.0p25 (semver)
Affected: 2.5.0b1 , < 2.5.0 (semver)
Create a notification for this product.
Credits
Alex Williams (Pellera Technologies)
Show details on NVD website
To clipboard 

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CVE-2026-24096 (GCVE-0-2026-24096)

Vulnerability from cvelistv5 – Published: 2026-04-01 10:07 – Updated: 2026-04-01 12:37
VLAI?
Title
Insufficient permission validation on multiple REST API Quick Setup endpoints
Summary
Insufficient permission validation on multiple REST API Quick Setup endpoints in Checkmk 2.5.0 (beta) before version 2.5.0b2 and 2.4.0 before version 2.4.0p25 allows low-privileged users to perform unauthorized actions or obtain sensitive information
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0b1 , < 2.5.0b2 (semver)
Affected: 2.4.0 , < 2.4.0p25 (semver)
Create a notification for this product.
Credits
PS Positive Security GmbH
Show details on NVD website
To clipboard 

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CVE-2026-20915 (GCVE-0-2026-20915)

Vulnerability from cvelistv5 – Published: 2026-03-31 13:51 – Updated: 2026-03-31 17:15
VLAI?
Title
Stored cross-site scripting in Pending Changes sidebar
Summary
Stored cross-site scripting (XSS) in Checkmk version 2.5.0 (beta) before 2.5.0b2 allows authenticated users with permission to create pending changes to inject malicious JavaScript into the Pending Changes sidebar, which will execute in the browsers of other users viewing the sidebar.
Severity ?
8.5 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0b1 , < 2.5.0b2 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33276 (GCVE-0-2026-33276)

Vulnerability from cvelistv5 – Published: 2026-03-31 13:44 – Updated: 2026-03-31 15:45
VLAI?
Title
XSS in Unified Search via Unescaped Host/Service Names
Summary
Stored cross-site scripting (XSS) in Checkmk 2.5.0 (beta) before 2.5.0b2 allows authenticated users with permission to create hosts or services to execute arbitrary JavaScript in the browsers of other users performing searches in the Unified Search feature.
Severity ?
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.5.0b1 , < 2.5.0b2 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-2859 (GCVE-0-2026-2859)

Vulnerability from cvelistv5 – Published: 2026-03-13 09:40 – Updated: 2026-03-13 15:48
VLAI?
Title
Unauthenticated Host Enumeration via Observable Response Discrepancy on Deploy Agent Endpoint
Summary
Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows unauthenticated users to enumerate existing hosts by observing different HTTP response codes in deploy_agent endpoint, which could lead to information disclosure.
Severity ?
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p23 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Affected: 2.2.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-24097 (GCVE-0-2026-24097)

Vulnerability from cvelistv5 – Published: 2026-03-13 09:40 – Updated: 2026-03-13 15:56
VLAI?
Title
Authenticated Host Enumeration via Observable Response Discrepancy on Agent Register Existing Endpoint
Summary
Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows authenticated users to enumerate existing hosts by observing different HTTP response codes in agent-receiver/register_existing endpoint, which could lead to information disclosure.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-204 - Observable Response Discrepancy
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p23 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Affected: 2.2.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-3103 (GCVE-0-2026-3103)

Vulnerability from cvelistv5 – Published: 2026-03-04 13:15 – Updated: 2026-03-04 14:07
VLAI?
Title
Deletion of passwords via RestApi
Summary
A logic error in the remove_password() function in Checkmk GmbH's Checkmk versions <2.4.0p23, <2.3.0p43, and 2.2.0 (EOL) allows a low-privileged user to cause data loss.
Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p23 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Affected: 2.2.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-64999 (GCVE-0-2025-64999)

Vulnerability from cvelistv5 – Published: 2026-02-26 10:26 – Updated: 2026-04-14 14:28
VLAI?
Title
Cross-site scripting in HTML logs of Synthetic Monitoring test services
Summary
Improper neutralization of input in Checkmk versions 2.4.0 before 2.4.0p22, and 2.3.0 before 2.3.0p43 allows an attacker that can manipulate a host's check output to inject malicious JavaScript into the Synthetic Monitoring HTML logs, which can then be accessed via a crafted phishing link.
Severity ?
7.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p22 (semver)
Affected: 2.3.0 , < 2.3.0p43 (semver)
Create a notification for this product.
Credits
Lisa Gnedt (SBA Research)
Show details on NVD website
To clipboard 

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CVE-2025-65000 (GCVE-0-2025-65000)

Vulnerability from cvelistv5 – Published: 2025-12-18 14:04 – Updated: 2025-12-18 15:28
VLAI?
Title
Exposure of SSH Private Keys in Remote Alert Handlers (Linux) Rule
Summary
SSH private keys of the "Remote alert handlers (Linux)" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0. This potentially allowed unauthorized triggering of predefined alert handlers on hosts where the handler was deployed.
Severity ?
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:L
CWE
  • CWE-212 - Improper Removal of Sensitive Information Before Storage or Transfer
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p18 (semver)
Affected: 2.3.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-64997 (GCVE-0-2025-64997)

Vulnerability from cvelistv5 – Published: 2025-12-18 09:11 – Updated: 2025-12-18 14:27
VLAI?
Title
Insufficient permission validation when showing agent information
Summary
Insufficient permission validation in Checkmk versions prior to 2.4.0p17 and 2.3.0p42 allow low-privileged users to view agent information via the REST API, which could lead to information disclosure.
Severity ?
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p17 (semver)
Affected: 2.3.0 , < 2.3.0p42 (semver)
Create a notification for this product.
Credits
PS Positive Security GmbH
Show details on NVD website
To clipboard 

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          "product": "Checkmk",
          "vendor": "Checkmk GmbH",
          "versions": [
            {
              "lessThan": "2.4.0p17",
              "status": "affected",
              "version": "2.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.3.0p42",
              "status": "affected",
              "version": "2.3.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.4.0p17",
                  "versionStartIncluding": "2.4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.3.0p42",
                  "versionStartIncluding": "2.3.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "PS Positive Security GmbH"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Insufficient permission validation in Checkmk versions prior to 2.4.0p17 and 2.3.0p42 allow low-privileged users to view agent information via the REST API, which could lead to information disclosure."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-180",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-180: Exploiting Incorrectly Configured Access Control Security Levels"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-280",
              "description": "CWE-280: Improper Handling of Insufficient Permissions or Privileges",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-18T09:11:17.431Z",
        "orgId": "f7d6281c-4801-44ce-ace2-493291dedb0f",
        "shortName": "Checkmk"
      },
      "references": [
        {
          "url": "https://checkmk.com/werk/18681"
        }
      ],
      "title": "Insufficient permission validation when showing agent information"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f7d6281c-4801-44ce-ace2-493291dedb0f",
    "assignerShortName": "Checkmk",
    "cveId": "CVE-2025-64997",
    "datePublished": "2025-12-18T09:11:17.431Z",
    "dateReserved": "2025-11-12T09:16:24.093Z",
    "dateUpdated": "2025-12-18T14:27:48.647Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}