XSS in Nagios Log Server
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.766 (99.5th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.766 · newest: 0.766 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.nagios.com/downloads/nagios-log-server/change-log/ (Release Notes, Vendor Advisory)
- research.nccgroup.com/ (Third Party Advisory)
- research.nccgroup.com/2021/07/22/technical-advisory-stored-and-reflected-xss-vu… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-35478?
- CVE-2021-35478 is a medium-severity vulnerability in Nagios Log Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-07-30.
- How severe is CVE-2021-35478?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2021-35478 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.