CVE-2020-10821
Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.
Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.
- Record
CVE-2020-10821- CVSS 3.1
- 4.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.
- Record
CVE-2020-10821- Updated
- 2026-11-02
EUVDEUVD-2020-3227 No score
Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.
- Record
EUVD-2020-3227- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5jfg-wp6g-xrjf No score
Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.
Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.
- Record
GHSA-5jfg-wp6g-xrjf- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-10821 is a medium vulnerability (CVSS 4.8) in Nagios Xi, published March 22, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 71.3%, the 99th percentile. No source names a fixed version.
