CVE-2025-62411: Librenms/librenms Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-frc6-pwgr-c28w",
  "modified" : "2025-10-16T19:28:59Z",
  "published" : "2025-10-16T16:52:13Z",
  "aliases" : [ "CVE-2025-62411" ],
  "summary" : "LibreNMS has a Stored XSS vulnerability in its Alert Transport name field",
  "details" : "### Summary\n\nLibreNMS <= 25.8.0 contains a **Stored Cross-Site Scripting (XSS)** vulnerability in the Alert Transports management functionality. When an administrator creates a new Alert Transport, the value of the `Transport name` field is stored and later rendered in the **Transports** column of the **Alert Rules** page without proper input validation or output encoding. This leads to arbitrary JavaScript execution in the admin’s browser.\n\n### Details\n\n* **Injection point:** `Transport name` field in `/alert-transports`.\n* **Execution point:** **Transports** column in `/alert-rules`.\n* **Scope:** Only administrators can create Alert Transports, and only administrators can view the affected Alert Rules page. Therefore, both exploitation and impact are limited to admin users.\n\n### Steps to reproduce\n\n1. Log in with an administrator account.\n2. Navigate to:\n\n   ```\n   http://localhost:8000/alert-transports\n   ```\n3. Click **Create alert transport** and provide the following values:\n\n   * **Transport name:**\n\n     ```html\n     'onfocus='alert(1)' autofocus=\n     ```\n   * **Default Alert:** `ON`\n   * **Email:** `test@gmail.com` (or any valid email)\n   \n    Save the transport.\n   \n4. Navigate to ```http://localhost:8000/alert-rules```. A popup `alert(1)` is triggered, confirming that the payload executes.\n<img width=\"1829\" height=\"396\" alt=\"image\" src=\"https://github.com/user-attachments/assets/932ba17d-214d-4253-80b8-62539d1cfa28\" />\n\n### Impact\n\nOnly accounts with the admin role who access the **Alert Rules** page (`http://localhost:8000/alert-rules`) are affected.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "librenms/librenms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "25.10.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/security/advisories/GHSA-frc6-pwgr-c28w"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-62411"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/commit/706a77085f4d5964f7de9444208ef707e1f79450"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/commit/e1ead366239b57e88f9a06d4f7c213b1e2530cd8"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/librenms/librenms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/releases/tag/25.10.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-10-16T16:52:13Z",
    "nvd_published_at" : "2025-10-16T18:15:39Z"
  }
}