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 malicious HTML or JavaScript into check output that executes in the browser of an admin or a user with host read permissions when they run the check on the service discovery page.
References
| Link | Resource |
|---|---|
| https://checkmk.com/werk/17993 | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
08 Jun 2026, 15:53
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://checkmk.com/werk/17993 - Vendor Advisory | |
| CPE | cpe:2.3:a:checkmk:checkmk:2.3.0:p2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p47:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p26:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p47:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:b5:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p7:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:b2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p37:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b6:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b4:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p6:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p46:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:b5:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p19:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p18:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:b6:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p9:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p42:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:b1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p22:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p34:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p45:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p34:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p25:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p32:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p21:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p46:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:b1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p15:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p36:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p23:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p16:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p33:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p29:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p44:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p28:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p28:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b8:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p4:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:p1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p10:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p20:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p10:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p13:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p15:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:p2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p20:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p38:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b5:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p27:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:*:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p11:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p40:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:b3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p44:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:p4:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p45:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p41:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p25:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p16:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p5:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p43:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b7:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:b4:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:-:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p6:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p14:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p22:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:b2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:b6:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p32:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p41:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p21:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:b2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p15:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p13:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p7:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p16:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:p3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p17:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p4:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p5:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p11:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:b3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:b1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p17:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p12:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p9:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p26:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p12:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p31:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p19:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p25:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p14:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p42:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p23:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p6:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p21:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p43:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p27:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p24:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p27:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p24:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p36:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p29:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p19:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:b4:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p20:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p23:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p30:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p30:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p18:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p26:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p12:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p28:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p11:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p14:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p35:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p37:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p5:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:-:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p31:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p24:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p17:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p10:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p29:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p13:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p39:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p38:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p40:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:i1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p8:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p9:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p2:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p4:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:-:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.4.0:p8:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p18:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p7:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p33:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p39:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p30:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.5.0:b3:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:-:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p8:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:b1:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.2.0:p22:*:*:*:*:*:* cpe:2.3:a:checkmk:checkmk:2.3.0:p35:*:*:*:*:*:* |
|
| First Time |
Checkmk checkmk
Checkmk |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.8 |
08 Jun 2026, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-08 13:16
Updated : 2026-06-08 15:53
NVD link : CVE-2026-9549
Mitre link : CVE-2026-9549
CVE.ORG link : CVE-2026-9549
JSON object : View
Products Affected
checkmk
- checkmk
CWE
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
