CVE-2017-11507

Name: CVE-2017-11507
Creator: NVD / NIST
Published: 2017-12-11T16:29:00.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.03%

Last modified Jun 17, 2026

CVE-2017-11507 is a vulnerability of currently unknown severity. A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.2.8x prior to 1.2.8p25 and 1.4.0x prior to 1.4.0p9, allowing an unauthenticated attacker to inject arbitrary HTML or JavaScript via the output_format parameter, and the username parameter of failed HTTP basic authentication attempts, which is returned unencoded in an internal server error page.. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

Description

A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.2.8x prior to 1.2.8p25 and 1.4.0x prior to 1.4.0p9, allowing an unauthenticated attacker to inject arbitrary HTML or JavaScript via the output_format parameter, and the username parameter of failed HTTP basic authentication attempts, which is returned unencoded in an internal server error page.

Metrics

EPSS Probability

1.03%

59.3th 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	1.2.8
Check Mk Project	Check Mk	1.4.0

References

http://mathias-kettner.com/check_mk_werks.php?werk_id=7661Vendor Advisory
https://www.tenable.com/security/research/tra-2017-20Exploit, Third Party Advisory
http://mathias-kettner.com/check_mk_werks.php?werk_id=7661Vendor Advisory
https://www.tenable.com/security/research/tra-2017-20Exploit, Third Party Advisory

Timeline

Published: Dec 11, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-11507?

How severe is CVE-2017-11507?

Severity scoring for CVE-2017-11507 is pending analysis. The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2017-11507?

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-2017-11507?

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

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Source: NVD / NIST