TI-2017-07162 Aliases CVE-2017-9781 GHSA-85cm-vx4m-p4x4

A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.4.0x prior to…

LOW 30CWE-79Published 2017-06-21 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.4.0x prior to 1.4.0p6, allowing an unauthenticated remote attacker to inject arbitrary HTML or JavaScript via the _username parameter when attempting authentication to webapi.py, which is returned unencoded with content type text/html.

Why it matters now

EPSS 0.01446 73rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPE	Versions	Role	Vendor
cpe:2.3:a:check_mk_project:check_mk:1.4.0:::::::*	1.4.0	Vulnerable	Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p1::::::	1.4.0 p1	Vulnerable	Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p2::::::	1.4.0 p2	Vulnerable	Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p3::::::	1.4.0 p3	Vulnerable	Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p4::::::	1.4.0 p4	Vulnerable	Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p5::::::	1.4.0 p5	Vulnerable	Check Mk Project

cpe:2.3:a:check_mk_project:check_mk:1.4.0:*:*:*:*:*:*:* Versions 1.4.0 Vulnerable ·Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p1:*:*:*:*:*:* Versions 1.4.0 p1 Vulnerable ·Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p2:*:*:*:*:*:* Versions 1.4.0 p2 Vulnerable ·Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p3:*:*:*:*:*:* Versions 1.4.0 p3 Vulnerable ·Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p4:*:*:*:*:*:* Versions 1.4.0 p4 Vulnerable ·Check Mk Project
cpe:2.3:a:check_mk_project:check_mk:1.4.0:p5:*:*:*:*:*:* Versions 1.4.0 p5 Vulnerable ·Check Mk Project

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2017-9781
2026-10-03 Alias added: GHSA-85cm-vx4m-p4x4

References

Exploit 1

https://www.tenable.com/security/research/tra-2017-21

Other 1

http://git.mathias-kettner.de/git/?p=check_mk.git%3Ba=blob%3Bf=.werks/4757%3Bhb=c248f0b6ff7b15ced9f07a3df8a80fad656ea5b1

TI-2014-04356 The wato component in Check_MK before 1.2.4p4 and 1.2.5 before 1.2.5i4 uses the pickle… CVSS 2.0HIGH 9.3
TI-2014-01849 Check_MK 1.2.2p2, 1.2.2p3, and 1.2.3i5 allows remote authenticated users to execute… CVSS 2.0HIGH 8.5
TI-2014-01848 Multiple cross-site request forgery (CSRF) vulnerabilities in the Multisite GUI in… CVSS 2.0MEDIUM 6.8
TI-2017-08509 Cross-site scripting in Tenable Check_MK CVSS 3.0MEDIUM 6.1
TI-2014-01850 Check_MK before 1.2.2p3 and 1.2.3x before 1.2.3i5 allows remote authenticated users to… CVSS 2.0MEDIUM 5.5
TI-2014-04355 Check_MK before 1.2.4p4 and 1.2.5 before 1.2.5i4 allows remote authenticated users to… CVSS 2.0MEDIUM 4.9

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences