CVE-2017-9781

Name: CVE-2017-9781
Creator: NVD / NIST
Published: 2017-06-21T18:29:00.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.56%

Last modified Jun 17, 2026

CVE-2017-9781 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.56% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

1.56%

72.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Check Mk Project	Check Mk	1.4.0

References

Timeline

Published: Jun 21, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-9781?

How severe is CVE-2017-9781?

Severity scoring for CVE-2017-9781 is pending analysis. The EPSS model estimates a 1.56% probability of exploitation in the next 30 days.

How do I fix CVE-2017-9781?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-9781?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST