CVE-2020-35128: Mautic/core Cross-Site Scripting Vulnerability

CRITICAL
Advisory Identifier: GHSA-98j2-3jv7-274m
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CVSS 9.0
CWE-79
Published
Advisory Summary

CVE-2020-35128 is a CRITICAL (CVSS 9.0) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Mautic/core libraries in the Packagist ecosystem. The issue involves mautic stored cross-site scripting (xss). Remediation is available by upgrading affected packages to version 3.2.4, 2.16.5.

CVE-2020-35128 at a Glance

CVE Identifier CVE-2020-35128
GHSA Identifier GHSA-98j2-3jv7-274m
Severity CRITICAL
CVSS v3.1 Base Score 9.0
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Mautic/core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.0

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:H/I:H/A:H).

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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-35128

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

mautic/core fixed: 3.2.4 
Upgrade mautic/core to 3.2.4
mautic/core fixed: 2.16.5 
Upgrade mautic/core to 2.16.5
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 mautic/core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-35128, inspect your project dependencies for Mautic/core:

inspect dependencies for mautic/core

Analyze the terminal output to locate any version of Mautic/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.2.4), 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 Mautic/core, 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

Mautic before 3.2.4 is affected by stored XSS. An attacker with permission to manage companies, an application feature, could attack other users, including administrators. For example, by loading an externally crafted JavaScript file, an attacker could eventually perform actions as the target user. These actions include changing the user passwords, altering user or email addresses, or adding a new administrator to the system.

CVE-2020-35128 Affected Mautic/core Versions

2 component(s)
Fixed Versions:
3.2.42.16.5
Product / Package Ecosystem Affected Versions Fixed Version
mautic/core
 Packagist
≥ 3.2.0
< 3.2.4
3.2.4
mautic/core
 Packagist
≥ 2.0.0
< 2.16.5
2.16.5

References

NVD — CVE-2020-35128 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35128
forum.mautic.org/c/announcements/16 WEB
https://forum.mautic.org/c/announcements/16
Mautic/core Release RELEASE
https://forum.mautic.org/t/security-release-for-all-versions-of-mautic-prior-to-2-16-5-and-3-2-4/17786
Mautic/core Source Repository REPOSITORY
https://github.com/mautic/mautic
labs.bishopfox.com/advisories/mautic-v... WEB
https://labs.bishopfox.com/advisories/mautic-version-3.2.2

Frequently Asked Questions

What is CVE-2020-35128?
CVE-2020-35128 is a security vulnerability in Mautic/core involving Mautic stored Cross-site Scripting (XSS) under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Mautic/core versions are affected?
Affected versions include releases prior to 3.2.4, 2.16.5 across affected packages: mautic/core.
What version fixes CVE-2020-35128?
Upgrading to 3.2.4, 2.16.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mautic/core affected?
Yes, mautic/core is affected in releases prior to 3.2.4, 2.16.5. Upgrade your dependency to 3.2.4, 2.16.5 or later.
What is the CVSS score of CVE-2020-35128?
CVE-2020-35128 has a CVSS v3.1 base score of 9.0 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2020-35128?
CVE-2020-35128 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-2020-35128?
Run the dependency tree command: 'inspect dependencies for mautic/core'. 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-98j2-3jv7-274m",
  "modified" : "2024-04-23T23:00:18Z",
  "published" : "2022-05-24T17:39:28Z",
  "aliases" : [ "CVE-2020-35128" ],
  "summary" : "Mautic stored Cross-site Scripting (XSS)",
  "details" : "Mautic before 3.2.4 is affected by stored XSS. An attacker with permission to manage companies, an application feature, could attack other users, including administrators. For example, by loading an externally crafted JavaScript file, an attacker could eventually perform actions as the target user. These actions include changing the user passwords, altering user or email addresses, or adding a new administrator to the system.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "mautic/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.2.0"
      }, {
        "fixed" : "3.2.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "mautic/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.16.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35128"
  }, {
    "type" : "WEB",
    "url" : "https://forum.mautic.org/c/announcements/16"
  }, {
    "type" : "WEB",
    "url" : "https://forum.mautic.org/t/security-release-for-all-versions-of-mautic-prior-to-2-16-5-and-3-2-4/17786"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mautic/mautic"
  }, {
    "type" : "WEB",
    "url" : "https://labs.bishopfox.com/advisories/mautic-version-3.2.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-23T23:00:18Z",
    "nvd_published_at" : "2021-01-19T14:15:00Z"
  }
}