{"id":"CVE-2025-62411","aliases":["GHSA-frc6-pwgr-c28w"],"url":"https://o3.security/vulnerability/CVE-2025-62411","summary":"Stored XSS in Alert Transport name field in LibreNMS","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.","published":"2025-10-16T17:50:28.184Z","modified":"2026-08-12T03:51:25.511131502Z","cvss":{"score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N"},"epss":{"score":0.12717,"percentile":0.96057,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"librenms/librenms","fixedVersion":"25.10.0"}],"fix":{"url":"https://github.com/librenms/librenms/commit/706a77085f4d5964f7de9444208ef707e1f79450","label":"librenms/librenms@706a770"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62411.json"},{"type":"ADVISORY","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":"FIX","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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:25.511131502Z"}}