CRITICAL
LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the $_POST['community'] parameter to html/pages/addhost.inc.php during creation of a new device, and then making a /ajax_output.php?id=capture&format=text&type=snmpwalk&hostname=localhost request that triggers html/includes/output/capture.inc.php command mishandling
Published Apr 24, 2019
9.8
CRITICALCVSS 3.0
EPSS 71.49%
Description
LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the $_POST['community'] parameter to html/pages/addhost.inc.php during creation of a new device, and then making a /ajax_output.php?id=capture&format=text&type=snmpwalk&hostname=localhost request that triggers html/includes/output/capture.inc.php command mishandling.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
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.
71.49% 0.71487
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.71487
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 (38 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 71.49% (0.71487) | 99.40th | v5 (v2026.06.15) |
| Sep 22, 2026 | 71.49% (0.71487) | 99.39th | v5 (v2026.06.15) |
| Sep 21, 2026 | 65.03% (0.65031) | 99.24th | v5 (v2026.06.15) |
| Sep 6, 2026 | 71.49% (0.71487) | 99.37th | v5 (v2026.06.15) |
| Sep 5, 2026 | 65.03% (0.65031) | 99.22th | v5 (v2026.06.15) |
| Aug 30, 2026 | 71.49% (0.71487) | 99.37th | v5 (v2026.06.15) |
| Aug 28, 2026 | 65.03% (0.65031) | 99.22th | v5 (v2026.06.15) |
| Aug 24, 2026 | 71.49% (0.71487) | 99.36th | v5 (v2026.06.15) |
| Aug 23, 2026 | 65.03% (0.65031) | 99.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 71.49% (0.71487) | 99.33th | v5 (v2026.06.15) |
| Nov 21, 2025 | 66.99% (0.66987) | 98.47th | v4 (v2025.03.14) |
| Nov 18, 2025 | 75.71% (0.75707) | 98.98th | v4 (v2025.03.14) |
| Mar 17, 2025 | 66.99% (0.66987) | 98.42th | v4 (v2025.03.14) |
| Dec 17, 2024 | 96.07% (0.96070) | 99.63th | v3 (v2023.03.01) |
| Dec 12, 2024 | 94.76% (0.94761) | 99.36th | v3 (v2023.03.01) |
| Oct 24, 2024 | 95.08% (0.95080) | 99.37th | v3 (v2023.03.01) |
| Jun 28, 2024 | 96.81% (0.96809) | 99.70th | v3 (v2023.03.01) |
| May 22, 2024 | 96.86% (0.96859) | 99.70th | v3 (v2023.03.01) |
| May 5, 2024 | 96.91% (0.96907) | 99.71th | v3 (v2023.03.01) |
| Apr 17, 2024 | 96.81% (0.96806) | 99.67th | v3 (v2023.03.01) |
| Apr 2, 2024 | 96.68% (0.96678) | 99.63th | v3 (v2023.03.01) |
| Mar 15, 2024 | 96.59% (0.96594) | 99.60th | v3 (v2023.03.01) |
| Feb 28, 2024 | 96.49% (0.96486) | 99.55th | v3 (v2023.03.01) |
| Feb 12, 2024 | 96.63% (0.96629) | 99.59th | v3 (v2023.03.01) |
| Dec 20, 2023 | 96.87% (0.96870) | 99.63th | v3 (v2023.03.01) |
| Dec 8, 2023 | 96.88% (0.96878) | 99.63th | v3 (v2023.03.01) |
| Nov 5, 2023 | 96.80% (0.96801) | 99.57th | v3 (v2023.03.01) |
| Sep 5, 2023 | 96.84% (0.96838) | 99.55th | v3 (v2023.03.01) |
| Jul 4, 2023 | 96.88% (0.96880) | 99.53th | v3 (v2023.03.01) |
| Jun 3, 2023 | 96.94% (0.96941) | 99.56th | v3 (v2023.03.01) |
| May 18, 2023 | 97.01% (0.97008) | 99.58th | v3 (v2023.03.01) |
| Mar 15, 2023 | 96.93% (0.96929) | 99.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 96.96% (0.96958) | 99.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 89.16% (0.89156) | 99.82th | v2 (v2022.01.01) |
| Feb 4, 2022 | 89.16% (0.89156) | 99.78th | v2 (v2022.01.01) |
| Feb 3, 2022 | 34.51% (0.34512) | 97.75th | v1 |
| Sep 1, 2021 | 34.51% (0.34512) | 98.78th | v1 |
| Apr 14, 2021 | 34.51% (0.34512) | 0.00th | v1 |
Weaknesses (1)
References (7)
- http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html x_refsource_MISC
- http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html x_refsource_MISC
- https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing x_refsource_MISCPermissions RequiredThird Party Advisory
- https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d x_refsource_MISCExploitThird Party Advisory
- https://github.com/advisories/GHSA-62q7-qj6g-gvr7 Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-20434
- https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434 x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html | x_refsource_MISC | |
| http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html | x_refsource_MISC | |
| https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing | x_refsource_MISCPermissions RequiredThird Party Advisory | |
| https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d | x_refsource_MISCExploitThird Party Advisory | |
| https://github.com/advisories/GHSA-62q7-qj6g-gvr7 | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-20434 | ||
| https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434 | x_refsource_MISCExploitTechnical DescriptionThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 24, 2019
Updated Aug 5, 2024
Reserved Dec 24, 2018
Link CVE-2018-20434
CISA Vulnrichment
GHSA-62Q7-QJ6G-GVR7 Updated n/a