Sign in
Deutsch English Español Polski
Medium

LibreNMS: Stored XSS via graph_descr admin config settings echoed without escaping to all authenticated users

  • Disclosed: 18.08.2026
  • Updated: 11.10.2026 10:22

Summary

The graph_descr.<graphtype> family of settings is echoed verbatim without htmlspecialchars() in includes/html/pages/graphs.inc.php:194. Any admin can store a malicious HTML payload that executes in every authenticated user's browser viewing that graph type.

CVSS

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N — 4.8 Medium

Details

php
// graphs.inc.php:194
echo LibrenmsConfig::get('graph_descr.' . $vars['type']);

PoC

PUT /settings/graph_descr.device_processor
{"value": "<img src=x onerror=\"alert('ADV-15')\">"}

GET /graphs?type=device_processor
→ <img src=x onerror="alert('ADV-15')">

Fix

php
echo htmlspecialchars(LibrenmsConfig::get('graph_descr.' . $vars['type']), ENT_QUOTES, 'UTF-8');

Prerequisite

Admin session to set the config value.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package librenms/librenms < 26.7.0 26.7.0

References

CVSS score 4.8/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
Platform
Composer
Package
librenms/librenms
Disclosed
18.08.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-7cj5-v4pp-v632 - CC BY 4.0

Vulnerability history: librenms/librenms

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (106) in the archive
Total entries
106
First → latest
10.2019 08.2026
Without a fix
6
Exploited in attacks
0

Severity breakdown

  • Critical 5
  • High 39
  • Medium 56
  • Low 6

Disclosures per year

Severity:
  1. LibreNMS — Stored XSS via SNMP/Syslog Data in Legacy Templates
    High · 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
    High · 8.1 CVE-2026-84189 < 26.7.0 26.7.0
  3. LibreNMS: Stored XSS via graph_descr admin config settings echoed without escaping to all authenticated users this entry
    Medium · 4.8 CVE-2026-84188 < 26.7.0 26.7.0
  4. LibreNMS Vulnerable to Remote Code Execution by Signal Alert Transportation module
    High CVE-2026-55182 >= 21.6.0, < 26.5.0 26.5.0
  5. LibreNMS is Vulnerable to Remote Code Execution by Arbitrary File Write
    High CVE-2026-6204 >= 1.48, < 26.3.0 26.3.0
  6. LibreNMS has a Time-Based Blind SQL Injection in address-search.inc.php
    High · 8.8 CVE-2026-26990 < 26.2.0 26.2.0
  7. LibreNMS: SQL Injection in ajax_table.php spreads through a covert data stream.
    High CVE-2026-26988 < 26.2.0 26.2.0
  8. LibreNMS contains an authenticated SQL Injection vulnerability
    High · 7.1 CVE-2020-36947 <= 1.46 no fix
  9. LibreNMS has Authenticated Remote File Inclusion in ajax_form.php that Allows RCE
    High · 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
    High · 7.5 CVE-2024-52526 < 24.10.0 24.10.0
  11. LibreNMS has an Authenticated OS Command Injection
    Critical · 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
    High · 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
    High · 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
    High · 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
    High · 7.5 CVE-2024-51494 < 24.10.0 24.10.0
  16. LibreNMS has a Persistent XSS from Insecure Input Sanitization Affects Multiple Endpoints
    High · 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
    High · 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
    High · 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
    High · 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
    High · 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
    High · 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
    High · 7.5 CVE-2024-49754 < 24.10.0 24.10.0
  23. LibreNMS has Stored Cross-site Scripting vulnerability in "Device Group" Name
    High · 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
    High · 7.2 CVE-2024-32480 < 24.4.0 24.4.0
  25. LibreNMS uses Improper Sanitization on Service template name leads to Stored XSS
    High · 7.1 CVE-2024-32479 < 24.4.0 24.4.0
  26. LibreNMS vulnerable to SQL injection time-based leads to database extraction
    High · 8.8 CVE-2024-32461 < 24.4.0 24.4.0
  27. SQL injection in librenms/librenms
    High · 7.8 CVE-2023-5591 < 23.10.0 23.10.0
  28. Cross site scripting in librenms
    High · 8.4 CVE-2023-5060 < 23.9.1 23.9.1
  29. LibreNMS Cross-site Scripting vulnerability
    High · 7.6 CVE-2023-4347 < 23.8.0 23.8.0
  30. Deserialization of Untrusted Data in librenms/librenms
    High · 8.8 CVE-2022-3525 < 22.10.0 22.10.0
  31. Cross-site Scripting in librenms/librenms
    High · 7.6 CVE-2022-4068 < 22.10.0 22.10.0
  32. Insufficient Session Expiration in librenms/librenms
    Critical · 9.8 CVE-2022-4070 < 22.10.0 22.10.0
  33. Command injection in librenms
    High CVE-2022-29712 < 22.4.0 22.4.0
  34. LibreNMS Information Disclosure
    Critical · 9.8 CVE-2019-10665 <= 1.47 no fix
  35. LibreNMS arbitrary OS commands execution
    Critical · 9.8 CVE-2018-20434 = 1.46 no fix
  36. LibreNMS SQL Injection
    High · 8.8 CVE-2018-20678 < 1.65 1.65
  37. Improper Access Control in librenms
    High · 7.1 CVE-2022-0580 < 22.2.0 22.2.0
  38. Improper Authorization in librenms
    High · 7.1 CVE-2022-0587 < 22.2.0 22.2.0
  39. Path traversal in librenms/librenms
    Critical · 9.8 CVE-2021-44278 <= 21.11.0 no fix
  40. Exposure of Resource to Wrong Sphere in LibreNMS
    High · 8.8 CVE-2020-15877 < 1.65.1 1.65.1
  41. SQL Injection in librenms
    High · 8.8 CVE-2020-35700 < 21.1.0 21.1.0
  42. SQL Injection in LibreNMS
    High · 8.8 CVE-2019-10671 < 1.50.1 1.50.1
  43. SQL Injection in LibreNMS
    High · 8.1 CVE-2019-12465 < 1.53 1.53
  44. Path Traversal in LibreNMS
    High · 7.5 CVE-2019-12464 < 1.53 1.53
  45. Improper Encoding or Escaping of Output and Injection in LibreNMS
    High · 8.8 CVE-2019-12463 >= 1.50.1, < 1.53 1.53

Know which vulnerabilities affect your application

With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.

Connect your application
DockRay newsletter

Application security in your inbox

Important vulnerabilities, actionable guidance and practical advice for your applications. Choose your technologies and follow what matters to your project.

  • A daily digest of new vulnerabilities, critical ones included.
  • Notifications about important updates.
  • Practical advice on application security and monitoring.

Leave empty to receive updates for every technology.

Privacy policy

Free to subscribe. Unsubscribe with one click in any email.