CVE-2025-64999

HIGH EPSS 3.8%
Published Feb 26, 20264mo ago · Modified Jun 17, 20261w ago
7.3 CVSS 4.0
High
Find Similar
Published Feb 26, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
7.3
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction A
Scope X

Threat Intelligence

EPSS Exploit Probability
3.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 77

VendorProductVersionRange
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.3.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any
checkmkcheckmk2.4.0any

References 2

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.