How severe is CVE-2020-15877?

CVE-2020-15877 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15877 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15877?

CVE-2020-15877 affects Librenms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15877?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-15877 published?

CVE-2020-15877 was published on 2020-07-21 and last updated on 2026-06-17.

CVE-2020-15877

CVE-2020-15877 is a high-severity vulnerability in Librenms with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Librenms
Published: 2020-07-21
Last modified: 2026-06-17

Description

An issue was discovered in LibreNMS before 1.65.1. It has insufficient access control for normal users because of "'guard' => 'admin'" instead of "'middleware' => ['can:admin']" in routes/web.php.

Frequently asked questions

What is CVE-2020-15877?: An issue was discovered in LibreNMS before 1.65.1. It has insufficient access control for normal users because of "'guard' => 'admin'" instead of "'middleware' => ['can:admin']" in routes/web.php.
How severe is CVE-2020-15877?: CVE-2020-15877 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15877 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15877?: CVE-2020-15877 affects Librenms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15877?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-15877 published?: CVE-2020-15877 was published on 2020-07-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

More vulnerabilities in Librenms

CVE-2022-4070 — Critical (CVSS 9.8): Insufficient Session Expiration in GitHub repository librenms/librenms prior to 22.10.0.
CVE-2022-29712 — Critical (CVSS 9.8): LibreNMS v22.3.0 was discovered to contain multiple command injection vulnerabilities via the service_ip, hostname, and…
CVE-2021-44278 — Critical (CVSS 9.8): Librenms 21.11.0 is affected by a path manipulation vulnerability in includes/html/pages/device/showconfig.inc.php.
CVE-2019-10665 — Critical (CVSS 9.8): An issue was discovered in LibreNMS through 1.47. The scripts that handle the graphing options…
CVE-2018-20434 — Critical (CVSS 9.8): LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the $_POST['community'] parameter to…
CVE-2024-51092 — Critical (CVSS 9.1): LibreNMS before 24.10.0 allows a remote attacker to execute arbitrary code via OS command injection involving…

All CVEs affecting Librenms →