Authenticated script execution via unescaped Views URL
Published Nov 3, 2025 · Updated Nov 3, 2025
Cross-site scripting in Nagios XI before 5.8.7 allows remote authenticated users to execute script through a crafted Core Views URL. The embedded Core UI renders attacker-controlled URL input without applying escape_string() to neutralize it before inclusion in the response. A valid low-privilege session and victim interaction with the crafted URL are required, limiting the result to script execution in the victim's browser context.
Summary
What happened
Cross-site scripting in Nagios XI before 5.8.7 allows remote authenticated users to execute script through a crafted Core Views URL. The embedded Core UI renders attacker-controlled URL input without applying escape_string() to neutralize it before inclusion in the response. A valid low-privilege session and victim interaction with the crafted URL are required, limiting the result to script execution in the victim's browser context.
The record
- CVE
- CVE-2021-47698
- Published
- Nov 3, 2025
- Updated
- Nov 3, 2025
- Vendor
- Nagios Enterprises, LLC
- Product
- Nagios XI
- Classifications
- CWE-79, CAPEC-63, T1204.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 3, 2025CVE publishedPublication date reported by the CVE source.
- Nov 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <5.8.7
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo