CVE-2023-4347
MediumPublic exploitLibreNMS Cross-site Scripting vulnerability
Published Aug 16, 2023 · Updated Aug 12, 2026 · Also known as GHSA-m6pf-cm3f-7876
Key Facts
Patch immediately- CVE-2023-4347 is a medium-severity vulnerability (CVSS 5.4 v3.1) affecting Librenms, librenms/librenms (composer).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 70% probability of exploitation in the next 30 days.
- Fixed versions are available, including Librenms 23.8.0, librenms/librenms 23.8.0.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
70%
Higher than 99.3% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-4347 brief as a PDF
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Description
Cross-site Scripting (XSS) - Reflected in GitHub repository librenms/librenms prior to 23.8.0.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| LibrenmsLibrenms | See advisory | 23.8.0 |
| librenms/librenmscomposer | >= unspecified | 23.8.0 |
Patched Releases
Librenms
23.8.0
librenms/librenms
23.8.0
Timeline
Publicly disclosed
Aug 16, 2023
Last updated
Aug 12, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4347.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-4347
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-38687
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-39438
FAQ
Common Questions.
Cross-site Scripting (XSS) - Reflected in GitHub repository librenms/librenms prior to 23.8.0.
Affected: Librenms; librenms/librenms (composer) versions >= unspecified. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Librenms 23.8.0, librenms/librenms 23.8.0.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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