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No exploitation reportedFix available

CVE-2017-9781

No exploitation reported by the sources we read.

  • Published2017-06-21
  • WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2017-06-2118:29CVE publishedNVD

Versions per branch

NVD
Check mk project check mk
BranchAffectedFixed in
1.4= 1.4.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • check-mkUbuntu:Pro:16.04:LTSall versions · fixed in 1.2.6p12-1ubuntu0.16.04.1+esm1
  • check-mkUbuntu:18.04:LTSall versions · fixed in 1.2.8p16-1ubuntu0.2

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.06.1read 2026-10-23
  • NVDCVSS 2.04.3read 2026-10-23
  • NVDweakness (CWE)CWE-79read 2026-10-23
  • FIRST EPSSEPSS score1.4 %2026-11-04
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published
2017-06-21
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2017-9781?

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.

Is CVE-2017-9781 actively exploited?

Active exploitation of CVE-2017-9781 has not been confirmed. Its EPSS score was 1.4% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-9781?

CVE-2017-9781 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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