CVE-2020-15883: Munkireport/managedinstalls Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-79xr-v794-wq35
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2020-15883 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Munkireport/managedinstalls libraries in the Packagist ecosystem. The issue involves munkireport managed installs module reflected cross-site scripting (xss) vulnerability. Remediation is available by upgrading affected packages to version 2.6.

CVE-2020-15883 at a Glance

CVE Identifier CVE-2020-15883
GHSA Identifier GHSA-79xr-v794-wq35
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Munkireport/managedinstalls
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

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

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

How to Fix CVE-2020-15883

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

munkireport/managedinstalls fixed: 2.6 
Upgrade munkireport/managedinstalls to 2.6
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 munkireport/managedinstalls

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-15883, inspect your project dependencies for Munkireport/managedinstalls:

inspect dependencies for munkireport/managedinstalls

Analyze the terminal output to locate any version of Munkireport/managedinstalls in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.6), 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 Munkireport/managedinstalls, 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

A Cross-Site Scripting (XSS) vulnerability in the managedinstalls module before 2.6 for MunkiReport allows remote attackers to inject arbitrary web script or HTML via the last two URL parameters (through which installed packages names and versions are reported).

CVE-2020-15883 Affected Munkireport/managedinstalls Versions

1 component(s)
Fixed Versions:
2.6
Product / Package Ecosystem Affected Versions Fixed Version
munkireport/managedinstalls
 Packagist
< 2.6
2.6

References

NVD — CVE-2020-15883 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15883
Security Fix Commit FIX COMMIT
https://github.com/munkireport/managedinstalls/commit/708f6a2abc4b80a3751bcc9cf896f80d84250c55
Munkireport/managedinstalls Source Repository REPOSITORY
https://github.com/munkireport/managedinstalls
Munkireport/managedinstalls Release RELEASE
https://github.com/munkireport/managedinstalls/releases/tag/v2.6
Munkireport/managedinstalls Source Repository REPOSITORY
https://github.com/munkireport/munkireport-php
Munkireport/managedinstalls Release RELEASE
https://github.com/munkireport/munkireport-php/releases/tag/v5.6.3
GitHub Advisory / Wiki ADVISORY
https://github.com/munkireport/munkireport-php/wiki/20200722-Reflected-XSS-In-Managedinstalls-Module

Frequently Asked Questions

What is CVE-2020-15883?
CVE-2020-15883 is a security vulnerability in Munkireport/managedinstalls involving MunkiReport Managed Installs module Reflected Cross-Site Scripting (XSS) vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Munkireport/managedinstalls versions are affected?
Affected versions include releases prior to 2.6 across affected packages: munkireport/managedinstalls.
What version fixes CVE-2020-15883?
Upgrading to 2.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is munkireport/managedinstalls affected?
Yes, munkireport/managedinstalls is affected in releases prior to 2.6. Upgrade your dependency to 2.6 or later.
What is the CVSS score of CVE-2020-15883?
CVE-2020-15883 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2020-15883?
CVE-2020-15883 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 CVE-2020-15883?
Run the dependency tree command: 'inspect dependencies for munkireport/managedinstalls'. 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-79xr-v794-wq35",
  "modified" : "2025-11-19T15:16:10Z",
  "published" : "2022-05-24T17:24:15Z",
  "aliases" : [ "CVE-2020-15883" ],
  "summary" : "MunkiReport Managed Installs module Reflected Cross-Site Scripting (XSS) vulnerability",
  "details" : "A Cross-Site Scripting (XSS) vulnerability in the managedinstalls module before 2.6 for MunkiReport allows remote attackers to inject arbitrary web script or HTML via the last two URL parameters (through which installed packages names and versions are reported).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "munkireport/managedinstalls"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15883"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/munkireport/managedinstalls/commit/708f6a2abc4b80a3751bcc9cf896f80d84250c55"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/munkireport/managedinstalls"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/munkireport/managedinstalls/releases/tag/v2.6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/munkireport/munkireport-php"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/munkireport/munkireport-php/releases/tag/v5.6.3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/munkireport/munkireport-php/wiki/20200722-Reflected-XSS-In-Managedinstalls-Module"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-15T20:24:43Z",
    "nvd_published_at" : "2020-07-23T14:15:00Z"
  }
}