5.4

CVE-2022-50588: Nagios XI < 5.8.9 Stored XSS in Update Checking

Analyzed
Published 30-10-2025Last modified 17-11-2025

Vulnerability summary

CVE-2022-50588 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in nagios nagios_xi. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (NVD)
EPSS score
0.44%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware 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 5.8.9 are vulnerable to cross-site scripting (XSS) in the update checking feature. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.41% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nagios2 products

1 vendor · 2 products

References

2 links