GHSA-rp7w-624x-95qv: Duplicate Advisory Cross-Site Scripting Vulnerability

MODERATE
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CVSS 4.8
CWE-79
Published
Advisory Summary

GHSA-rp7w-624x-95qv is a MODERATE (CVSS 4.8) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Duplicate Advisory libraries in the Packagist ecosystem. The issue involves librenms affected by an authenticated cross-site scripting vulnerability on the showconfig page. Remediation is available by upgrading affected packages to version 26.3.0.

GHSA-rp7w-624x-95qv at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-rp7w-624x-95qv
Severity MODERATE
CVSS v3.1 Base Score 4.8
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Duplicate Advisory
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix GHSA-rp7w-624x-95qv

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

librenms/librenms fixed: 26.3.0 
Upgrade librenms/librenms to 26.3.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for librenms/librenms

How to Check if You Are Affected

To determine whether your application is affected by GHSA-rp7w-624x-95qv, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for librenms/librenms

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 26.3.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-5gm9-622f-qcg5. This link is maintained to preserve external references. ## Original Description LibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. Exploitation could result in XSS attacks being performed against other users with access to the page.

GHSA-rp7w-624x-95qv Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
26.3.0
Product / Package Ecosystem Affected Versions Fixed Version
librenms/librenms
 Packagist
< 26.3.0
26.3.0

References

NVD — GHSA-rp7w-624x-95qv NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2728
Duplicate Advisory Source Repository REPOSITORY
https://github.com/librenms/librenms
projectblack.io/blog/librenms-authe... WEB
https://projectblack.io/blog/librenms-authenticated-rce-and-xss/#xss-on-showconfig-page-2630

Frequently Asked Questions

What is GHSA-rp7w-624x-95qv?
GHSA-rp7w-624x-95qv is a security vulnerability in Duplicate Advisory involving LibreNMS affected by an authenticated Cross-site Scripting vulnerability on the showconfig page under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 26.3.0 across affected packages: librenms/librenms.
What version fixes GHSA-rp7w-624x-95qv?
Upgrading to 26.3.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is librenms/librenms affected?
Yes, librenms/librenms is affected in releases prior to 26.3.0. Upgrade your dependency to 26.3.0 or later.
What is the CVSS score of GHSA-rp7w-624x-95qv?
GHSA-rp7w-624x-95qv has a CVSS v3.1 base score of 4.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with GHSA-rp7w-624x-95qv?
GHSA-rp7w-624x-95qv is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for GHSA-rp7w-624x-95qv?
Run the dependency tree command: 'inspect dependencies for librenms/librenms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-rp7w-624x-95qv",
  "modified" : "2026-05-12T13:39:51Z",
  "published" : "2026-04-13T12:31:15Z",
  "withdrawn" : "2026-05-12T13:39:51Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: LibreNMS affected by an authenticated Cross-site Scripting vulnerability on the showconfig page",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-5gm9-622f-qcg5. This link is maintained to preserve external references.\n\n## Original Description\nLibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. Exploitation could result in XSS attacks being performed against other users with access to the page.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "librenms/librenms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.3.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-2728"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/librenms/librenms"
  }, {
    "type" : "WEB",
    "url" : "https://projectblack.io/blog/librenms-authenticated-rce-and-xss/#xss-on-showconfig-page-2630"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-14T22:50:26Z",
    "nvd_published_at" : "2026-04-13T11:16:05Z"
  }
}