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High severity8.4NVD Advisory· Published Oct 30, 2025· Updated Jun 17, 2026

CVE-2025-39663

CVE-2025-39663

Description

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. Affecting Checkmk before 2.4.0p14, 2.3.0p39, 2.2.0 and 2.1.0 (eol).

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

55
  • Checkmk/Checkmk55 versions
    cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*+ 54 more
    • cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*range: >=2.0.0,<2.3.0
    • cpe:2.3:a:checkmk:checkmk:2.3.0:-:*:*:*:*:*:*
    • 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:p1:*:*:*:*:*:*
    • 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:p2:*:*:*:*:*:*
    • 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:p3:*:*:*:*:*:*
    • cpe:2.3:a:checkmk:checkmk:2.3.0:p4:*:*:*:*:*:*
    • 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: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:p1:*:*:*:*:*:*
    • cpe:2.3:a:checkmk:checkmk:2.4.0:p2:*:*:*:*:*:*
    • 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:p9:*:*:*:*:*:*
    • (no CPE)range: before 2.4.0p14, 2.3.0p39, 2.2.0 and 2.1.0
    • (no CPE)range: 2.4.0

Patches

Vulnerability mechanics

References

3

News mentions

0

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