8.5

CVE-2018-25123: nagios nagios_xi Execution with Unnecessary Privileges

CVSS: 8.5v4.0HighAnalyzed
Published 30-10-2025Last modified 17-11-2025
Open JSON

Vulnerability summary

CVE-2018-25123 is a high (CVSS 8.5) Execution with Unnecessary Privileges vulnerability in nagios nagios_xi. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.1% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v4.0 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-10-2025
    PublishedVulnerability first disclosed.
  2. 17-11-2025
    Last modifiedVulnerability information updated.

Description

Nagios XI versions prior to 5.5.7 contain a privilege escalation vulnerability in the MRTG graphing component. MRTG-related processes/scripts executed with excessive privileges, allowing a local attacker with limited system access to abuse file/command execution paths or writable resources to gain elevated privileges.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.02 pp

From 0.33% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nagios2 products

1 vendor · 2 products

References

2 links