Rate limiting Bypass on login page in libreNMS

published 2023-11-17 2 y ago modified 2026-09-10 1 mo ago also GHSA-rq42-58qf-v3qx , EUVD-2023-3030

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits: 0; none known

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems. In affected versions the login method has no rate limit. An attacker may be able to leverage this vulnerability to gain access to user accounts. This issue has been addressed in version 23.11.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Patch / fix

fixed in 2 links 3

packagist librenms/librenms 23.11.0
librenms librenms 23.11.0

github.com/librenms/librenms@7c006e9 commit
github.com/librenms/librenms#15558 pull request
github.com/librenms/librenms/releases/tag/23.11.0 release

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-08-29)

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/librenms/librenms/security/advisories/GHSA-rq42-58qf-v3qx referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	librenms/librenms	<23.11.0	23.11.0

Affected products

librenms librenms

Classification

Weakness

CWE-307 Improper Restriction of Excessive Authentication Attempts
CWE-770 Allocation of Resources Without Limits or Throttling

References

github.com /librenms/librenms/pull/15558
web
github.com /librenms/librenms/commit/7c006e96251ae1d32e1a015b361a7bfbb815c028
web
github.com /librenms/librenms/security/advisories/GHSA-rq42-58qf-v3qx
web, exploit, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2023-46745
advisory
github.com /librenms/librenms
package
github.com /librenms/librenms/releases/tag/23.11.0
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary