Improper Encoding or Escaping of Output and Injection in LibreNMS

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.8 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2019-12463: 1.39% estimated exploitation activity in the next 30 days; percentile 72.39 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

An issue was discovered in LibreNMS 1.50.1. The scripts that handle graphing options (includes/html/graphs/common.inc.php and includes/html/graphs/graphs.inc.php) do not sufficiently validate or encode several fields of user supplied input. Some parameters are filtered with mysqlirealescapestring, which is only useful for preventing SQL injection attacks; other parameters are unfiltered. This allows an attacker to inject RRDtool syntax with newline characters via the html/graph.php and html/graph-realtime.php scripts. RRDtool syntax is quite versatile and an attacker could leverage this to perform a number of attacks, including disclosing directory structure and filenames, disclosing file content, denial of service, or writing arbitrary files. NOTE, relative to CVE-2019-10665, this requires authentication and the pathnames differ.

Published by the source

11 Oct 2019, 18:43 UTC

Last modified by the source

1 Feb 2023, 05:02 UTC

Source last checked

26 Oct 2026, 14:01 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-w5r2-gvgf-mpm8

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# Patch Next advisory brief: CVE-2019-12463

Advisory: Improper Encoding or Escaping of Output and Injection in LibreNMS
IDs: CVE-2019-12463, GHSA-w5r2-gvgf-mpm8
Record: https://patchnext.com/advisories/cve-2019-12463 (revision 1, source checked 26 Oct 2026, 14:01 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: librenms/librenms 1.53. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist librenms/librenms: affected >= 1.50.1, < 1.53; fixed in 1.53

## Suggested inspection (read-only)
- Packagist librenms/librenms: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on librenms/librenms.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-w5r2-gvgf-mpm8 (GitHub-reviewed advisory GHSA-w5r2-gvgf-mpm8 lists affected ranges: Packagist librenms/librenms >=1.50.1 <1.53)

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