CVE-2021-26023
The Favorites component before 1.0.2 for Nagios XI 5.8.0 is vulnerable to XSS.
The Favorites component before 1.0.2 for Nagios XI 5.8.0 is vulnerable to 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
The Favorites component before 1.0.2 for Nagios XI 5.8.0 is vulnerable to XSS.
- Record
CVE-2021-26023- 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 ListNo score
The Favorites component before 1.0.2 for Nagios XI 5.8.0 is vulnerable to XSS.
- Record
CVE-2021-26023- Updated
- 2026-11-02
EUVDEUVD-2021-12847No score
The Favorites component before 1.0.2 for Nagios XI 5.8.0 is vulnerable to XSS.
- Record
EUVD-2021-12847- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cpp5-h3qh-vqxmNo score
The Favorites component before 1.0.2 for Nagios XI 5.8.0 is vulnerable to XSS.
The Favorites component before 1.0.2 for Nagios XI 5.8.0 is vulnerable to XSS.
- Record
GHSA-cpp5-h3qh-vqxm- 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-2021-26023 is a medium vulnerability (CVSS 6.1) in Nagios Favorites, published February 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 25.5%, the 97th percentile. No source names a fixed version.