CVE-2020-15885: Munkireport/comment Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-vc4f-2g7f-pmqr
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2020-15885 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Munkireport/comment libraries in the Packagist ecosystem. The issue involves munkireport cross-site scripting (xss) filter bypass on comment. Remediation is available by upgrading affected packages to version 4.0.

CVE-2020-15885 at a Glance

CVE Identifier CVE-2020-15885
GHSA Identifier GHSA-vc4f-2g7f-pmqr
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Munkireport/comment
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.4

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2020-15885

To remediate this vulnerability, upgrade all affected Munkireport/comment 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/comment fixed: 4.0 
Upgrade munkireport/comment to 4.0
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 munkireport/comment

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-15885, inspect your project dependencies for Munkireport/comment:

inspect dependencies for munkireport/comment

Analyze the terminal output to locate any version of Munkireport/comment in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.0), 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 Munkireport/comment, 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 comment module before 4.0 for MunkiReport allows remote attackers to inject arbitrary web script or HTML by posting a new comment.

CVE-2020-15885 Affected Munkireport/comment Versions

1 component(s)
Fixed Versions:
4.0
Product / Package Ecosystem Affected Versions Fixed Version
munkireport/comment
 Packagist
< 4.0
4.0

References

NVD — CVE-2020-15885 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15885
Security Fix Commit FIX COMMIT
https://github.com/munkireport/comment/commit/ee4c1cd28fdcb42eb24c0cfea24ddf02478f9869
Munkireport/comment Source Repository REPOSITORY
https://github.com/munkireport/comment
Munkireport/comment Source Repository REPOSITORY
https://github.com/munkireport/comment/releases
Munkireport/comment Source Repository REPOSITORY
https://github.com/munkireport/munkireport-php
Munkireport/comment 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--XSS-Filter-Bypass-On-Comments

Frequently Asked Questions

What is CVE-2020-15885?
CVE-2020-15885 is a security vulnerability in Munkireport/comment involving MunkiReport Cross-Site Scripting (XSS) Filter Bypass On Comment under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Munkireport/comment versions are affected?
Affected versions include releases prior to 4.0 across affected packages: munkireport/comment.
What version fixes CVE-2020-15885?
Upgrading to 4.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is munkireport/comment affected?
Yes, munkireport/comment is affected in releases prior to 4.0. Upgrade your dependency to 4.0 or later.
What is the CVSS score of CVE-2020-15885?
CVE-2020-15885 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2020-15885?
CVE-2020-15885 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-2020-15885?
Run the dependency tree command: 'inspect dependencies for munkireport/comment'. 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-vc4f-2g7f-pmqr",
  "modified" : "2025-11-19T15:15:45Z",
  "published" : "2022-05-24T17:24:15Z",
  "aliases" : [ "CVE-2020-15885" ],
  "summary" : "MunkiReport Cross-Site Scripting (XSS) Filter Bypass On Comment",
  "details" : "A Cross-Site Scripting (XSS) vulnerability in the comment module before 4.0 for MunkiReport allows remote attackers to inject arbitrary web script or HTML by posting a new comment.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "munkireport/comment"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15885"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/munkireport/comment/commit/ee4c1cd28fdcb42eb24c0cfea24ddf02478f9869"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/munkireport/comment"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/munkireport/comment/releases"
  }, {
    "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--XSS-Filter-Bypass-On-Comments"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-15T18:56:52Z",
    "nvd_published_at" : "2020-07-23T14:15:00Z"
  }
}