CVE-2020-28903
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with...
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.
- Record
CVE-2020-28903- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.
- Record
CVE-2020-28903- Updated
- 2026-11-02
EUVDEUVD-2020-21294 No score
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.
- Record
EUVD-2020-21294- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c3f6-5x5g-vp36 No score
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with...
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.
- Record
GHSA-c3f6-5x5g-vp36- Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28903 is a medium vulnerability (CVSS 6.1) in Nagios Fusion, published May 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 13.2%, the 96th percentile. No source names a fixed version.
References
nagios.com/downloads/nagios-xi/change-log
skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you
packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html
nvd.nist.gov/vuln/detail/CVE-2020-28903
github.com/advisories/GHSA-c3f6-5x5g-vp36