CVE-2021-35478
MEDIUMCVSS 5.4/10EPSS 76.62%
Last modified
CVE-2021-35478 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function. All parameters used for filtering are affected. EPSS estimates a 76.62% chance of exploitation in the next 30 days.
Description
Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function. All parameters used for filtering are affected. This affects users who open a crafted link or third-party web page.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nagios | Log Server | < 2.1.9 |
References
- https://research.nccgroup.com/?research=Technical%20advisoriesThird Party Advisory
- https://www.nagios.com/downloads/nagios-log-server/change-log/Release Notes, Vendor Advisory
- https://research.nccgroup.com/?research=Technical%20advisoriesThird Party Advisory
- https://www.nagios.com/downloads/nagios-log-server/change-log/Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-35478?
Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function. All parameters used for filtering are affected. This affects users who open a crafted link or third-party web page.
How severe is CVE-2021-35478?
CVE-2021-35478 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 76.62% probability of exploitation in the next 30 days.
How do I fix CVE-2021-35478?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-35478?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST