Priority LOW 21
Stored cross-site scripting in the service discovery active check output in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can configure active or custom checks to inject malic…
CVSS 4.0MEDIUM 4.8· Network · High privileges · User interaction · EPSS 0.00143 · Published 2026-06-08 · Fixed in 2.5.0p5, 2.4.0p31 +1 CWE-79
Priority LOW 38
Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an authenticated user to bypass URL validation and inject malicio…
CVSS 4.0HIGH 8.5· Network · Low privileges · User interaction · EPSS 0.0014 · Published 2026-06-08 · Fixed in 2.5.0p5, 2.4.0p31 +1 CWE-79
Priority LOW 21
Stored cross-site scripting in the global settings change log in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can change global settings to store malicious HTML or JavaScript…
CVSS 4.0MEDIUM 4.8· Network · High privileges · User interaction · EPSS 0.00143 · Published 2026-06-08 · Fixed in 2.5.0p5, 2.4.0p31 +1 CWE-79
Priority LOW 33
Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows…
CVSS 4.0MEDIUM 6.3· Network · No auth · No interaction · EPSS 0.00187 · Published 2026-06-08 · Fixed in 2.5.0p5 CWE-863
Priority LOW 38
Stored cross-site scripting in the URL dashboard widget in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows a user with dashboard editing permissions to store a URL with a dangerous URI scheme such a…
CVSS 4.0HIGH 8.5· Network · Low privileges · User interaction · EPSS 0.00136 · Published 2026-06-08 · Fixed in 2.5.0p5, 2.4.0p31 +1 CWE-79
Priority LOW 22
Privilege escalation in the mk_mysql agent plugin on Windows in Checkmk <2.4.0p29, <2.3.0p47, and 2.2.0 (EOL) allows a local unprivileged user able to create a Windows service whose name matches 'MySQL' or 'MariaDB' (or…
CVSS 4.0MEDIUM 5.2· Local · Low privileges · No interaction · EPSS 0.00119 · Published 2026-05-13 · Fixed in 2.4.0p29, 2.3.0p47 CWE-427
Priority LOW 25
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 insufficien…
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00178 · Published 2026-04-10 · Fixed in 2.5.0b4, 2.4.0p26 +1 CWE-140
Priority LOW 25
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 de…
CVSS 4.0MEDIUM 5.1· Network · High privileges · No interaction · EPSS 0.002 · Published 2026-04-10 · Fixed in 2.5.0b4, 2.4.0p26 CWE-140
Priority LOW 25
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.
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00178 · Published 2026-04-10 · Fixed in 2.5.0b4 CWE-140
Priority MEDIUM 41
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 manipul…
CVSS 4.0CRITICAL 9.3· Local · High privileges · No interaction · EPSS 0.00123 · Published 2026-04-07 · Fixed in 2.3.0p46, 2.4.0p25 +1 CWE-426
Priority LOW 38
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 cre…
CVSS 4.0HIGH 8.5· Network · Low privileges · User interaction · EPSS 0.00232 · Published 2026-04-07 · Fixed in 2.3.0p46, 2.4.0p25 +1 CWE-79
Priority LOW 24
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 o…
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00245 · Published 2026-04-01 · Fixed in 2.5.0b2, 2.4.0p25 CWE-280
Priority LOW 38
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…
CVSS 4.0HIGH 8.5· Network · High privileges · User interaction · EPSS 0.00152 · Published 2026-03-31 · Fixed in 2.5.0b2 CWE-79
Priority LOW 38
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 se…
CVSS 4.0HIGH 8.6· Network · Low privileges · User interaction · EPSS 0.0015 · Published 2026-03-31 · Fixed in 2.5.0b2 CWE-79
Priority LOW 34
Exposure of session signing secret in Checkmk <2.4.0p23, <2.3.0p45 and 2.2.0 allows an administrator of a remote site with config sync enabled to hijack sessions on the central site by forging session cookies.
CVSS 4.0HIGH 7.3· Network · High privileges · User interaction · EPSS 0.00348 · Published 2026-03-24 · Fixed in 2.4.0p23, 2.3.0p45 CWE-522
Priority LOW 33
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 dep…
CVSS 4.0MEDIUM 6.3· Network · No auth · No interaction · EPSS 0.00202 · Published 2026-03-13 · Fixed in 2.4.0p23, 2.3.0p43 CWE-204
Priority LOW 30
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…
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00252 · Published 2026-03-13 · Fixed in 2.4.0p23, 2.3.0p43 CWE-204
Priority LOW 23
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.
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00197 · Published 2026-03-04 · Fixed in 2.4.0p23, 2.3.0p43 CWE-863
Priority HIGH 67
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 Monitor…
CVSS 4.0HIGH 7.3· Network · Low privileges · User interaction · EPSS 0.00168 · Published 2026-02-26 · Fixed in 2.4.0p22, 2.3.0p43 CWE-79
Priority LOW 11
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.
CVSS 4.0LOW 2.3· Network · Low privileges · No interaction · EPSS 0.00216 · Published 2025-12-18 · Fixed in 2.4.0p18 CWE-212
Priority LOW 34
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.
CVSS 4.0MEDIUM 6.3· Network · Low privileges · No interaction · EPSS 0.00243 · Published 2025-12-18 · Fixed in 2.4.0p17, 2.3.0p42 CWE-280
Priority LOW 23
Insufficient permission validation on multiple REST API endpoints in Checkmk 2.2.0, 2.3.0, and 2.4.0 before version 2.4.0p16 allows low-privileged users to perform unauthorized actions or obtain sensitive information
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00214 · Published 2025-11-18 · Fixed in 2.4.0p16 CWE-280
Priority LOW 23
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 disclosu…
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00176 · Published 2025-11-18 · Fixed in 2.4.0p16 CWE-280
Priority LOW 21
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…
CVSS 4.0MEDIUM 4.8· Local · Low privileges · No interaction · EPSS 0.00109 · Published 2025-11-18 · Fixed in 2.4.0p16, 2.3.0p41 CWE-732
Priority HIGH 72
Cross-Site Scripting (XSS) vulnerability in Checkmk's distributed monitoring allows a compromised remote site to inject malicious HTML code into service outputs in the central site.
CVSS 4.0HIGH 8.5· Network · High privileges · User interaction · EPSS 0.00603 · Published 2025-10-30 · Fixed in 2.4.0p14, 2.3.0p39 CWE-80
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