CVE-2025-64999

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-64999
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.

5.4 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://checkmk.com/werk/19238 Vendor Advisory
https://github.com/sbaresearch/advisories/tree/e72ce9bb6b9ffffc1fc35e4d8152ad153293c851/2025/SBA-ADV-20251118-01_Checkmk_Cross_Site_Scripting
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:checkmk:checkmk:2.3.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p10:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p11:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p16:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p17:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p18:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p19:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p20:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p21:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p22:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p23:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p24:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p25:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p26:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p27:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p28:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p29:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p30:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p31:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p32:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p33:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p34:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p35:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p36:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p37:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p38:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p39:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p40:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p41:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p42:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p7:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p8:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p9:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p10:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p11:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p16:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p17:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p18:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p19:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p20:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p21:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p7:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p8:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p9:*:*:*:*:*:*
History

05 Mar 2026, 15:16

Type Values Removed Values Added
References
  • () https://github.com/sbaresearch/advisories/tree/e72ce9bb6b9ffffc1fc35e4d8152ad153293c851/2025/SBA-ADV-20251118-01_Checkmk_Cross_Site_Scripting -

02 Mar 2026, 13:27

Type Values Removed Values Added
References () https://checkmk.com/werk/19238 - () https://checkmk.com/werk/19238 - Vendor Advisory
CPE cpe:2.3:a:checkmk:checkmk:2.4.0:p17:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p42:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p29:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p19:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p41:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p10:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p7:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p11:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p9:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p26:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p11:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p18:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p8:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p20:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p38:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p37:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p8:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p21:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p35:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p23:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p33:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p24:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p39:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p22:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p16:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p17:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p9:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p30:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p7:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p18:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p20:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p16:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p32:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p10:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p36:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p34:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p27:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p21:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p28:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p25:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p19:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p40:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p31:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p5:*:*:*:*:*:*
Summary
  • (es) La neutralización incorrecta de la entrada en las versiones de Checkmk 2.4.0 anteriores a la 2.4.0p22, y 2.3.0 anteriores a la 2.3.0p43 permite a un atacante que puede manipular la salida de verificación de un host inyectar JavaScript malicioso en los registros HTML de Monitoreo Sintético, a los que se puede acceder posteriormente a través de un enlace de phishing manipulado.
First Time Checkmk
Checkmk checkmk
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.4

26 Feb 2026, 11:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-26 11:16

Updated : 2026-03-05 15:16

NVD link : CVE-2025-64999

Mitre link : CVE-2025-64999

CVE.ORG link : CVE-2025-64999

JSON object : View

Products Affected

checkmk

  • checkmk
CWE
CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')