HIGH
Incorrect File Permissions in Nagios XI 5.7.5 and earlier and Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root
Published May 24, 2021
8.8
HIGHCVSS 3.1
EPSS 4.73%
Description
Incorrect File Permissions in Nagios XI 5.7.5 and earlier and Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root. Low-privileged users are able to modify files that are included (aka sourced) by scripts executed by root.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
8.8 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
9.0 HIGH NVD
AV:N/AC:L/Au:S/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.73% 0.04727
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.04727
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.73% (0.04727) | 91.57th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.73% (0.04727) | 90.65th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.28% (0.00279) | 49.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.29% (0.00290) | 69.89th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.29% (0.00290) | 68.16th | v3 (v2023.03.01) |
| Apr 10, 2023 | 0.29% (0.00290) | 64.29th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.35% (0.00348) | 67.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00890) | 28.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00890) | 26.62th | v2 (v2022.01.01) |
| Feb 4, 2022 | 11.75% (0.11752) | 89.17th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v1 |
| Jan 6, 2022 | 3.63% (0.03630) | 71.48th | v1 |
| Sep 1, 2021 | 0.83% (0.00833) | 57.50th | v1 |
| May 27, 2021 | 0.83% (0.00833) | 0.00th | v1 |
| May 25, 2021 | 0.62% (0.00624) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html x_refsource_MISCThird Party AdvisoryVDB Entry
- https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/ x_refsource_MISCThird Party Advisory
- https://www.nagios.com/downloads/nagios-xi/change-log/ x_refsource_MISCRelease NotesVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html | x_refsource_MISCThird Party AdvisoryVDB Entry | |
| https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/ | x_refsource_MISCThird Party Advisory | |
| https://www.nagios.com/downloads/nagios-xi/change-log/ | x_refsource_MISCRelease NotesVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published May 24, 2021
Updated Aug 4, 2024
Reserved Nov 17, 2020
Link CVE-2020-28906
CISA Vulnrichment
Updated n/a