CVE-2021-47693Network attack vectorHinoki check available

Authenticated SQL injection via unescaped search text

Published Oct 30, 2025 · Updated Oct 30, 2025

SQL injection in Nagios Enterprises' Nagios XI before 5.8.5 allows remote authenticated users to read or modify data through CCM searches. The CCM text query builder incorporates user-supplied search text into SQL statements without properly escaping its values. Access to configuration object editors is required; injected fragments can disclose or alter configuration and application data.

CVSS severity8.7
High
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SQL injection in Nagios Enterprises' Nagios XI before 5.8.5 allows remote authenticated users to read or modify data through CCM searches. The CCM text query builder incorporates user-supplied search text into SQL statements without properly escaping its values. Access to configuration object editors is required; injected fragments can disclose or alter configuration and application data.

The record

CVE
CVE-2021-47693
Published
Oct 30, 2025
Updated
Oct 30, 2025
Vendor
Nagios Enterprises, LLC
Product
Nagios XI
Classifications
CWE-89, CAPEC-66
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.8.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nagios Enterprises, LLC · Nagios XIversion=0 <5.8.5

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CAPEC-66SQL Injection

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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