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Public proof of conceptFix available

CVE-2018-8733

A public proof of concept exists; no exploitation attested.

  • Published2018-04-18
  • Fixed in5.4.13
  • WeaknessCWE-89

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

Authentication bypass vulnerability in the core config manager in Nagios XI 5.2.x through 5.4.x before 5.4.13 allows an unauthenticated attacker to make configuration changes and leverage an authenticated SQL injection vulnerability.

Timeline

dates in UTC
  1. 2018-04-30Exploit-DB entryExploit-DB

Versions per branch

NVD
Nagios nagios xi
BranchAffectedFixed in
5.x≥ 5.2.0, < 5.4.135.4.13

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

Fix

  1. Update Nagios nagios xi to 5.4.13

Advisories and patches

Detection

read 2026-11-04 22:56 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-44560EDB-44969
Exploit-DB
Metasploit modules
2 modulesexploit/linux/http/nagios_xi_chained_rcerank: excellentexploit/linux/http/nagios_xi_chained_rce_2_electric_boogaloorank: manualModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-04-18
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-8733?

Authentication bypass vulnerability in the core config manager in Nagios XI 5.2.x through 5.4.x before 5.4.13 allows an unauthenticated attacker to make configuration changes and leverage an authenticated SQL injection vulnerability.

Is CVE-2018-8733 actively exploited?

Active exploitation of CVE-2018-8733 has not been confirmed. Its EPSS score was 26.6% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-8733?

CVE-2018-8733 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record