CVE-2021-39166: Pimcore/pimcore Improper Neutralization Of Text-Values Vulnerability

HIGH
Advisory Identifier: GHSA-w6j8-jc36-x5q9
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CVSS 8.0
CWE-79
Published
Advisory Summary

CVE-2021-39166 is a HIGH (CVSS 8.0) improper neutralization of text-values vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Pimcore/pimcore libraries in the Packagist ecosystem. The issue involves improper neutralization of text-values in object version preview. Remediation is available by upgrading affected packages to version 10.1.2.

CVE-2021-39166 at a Glance

CVE Identifier CVE-2021-39166
GHSA Identifier GHSA-w6j8-jc36-x5q9
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Pimcore/pimcore
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.0

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:U/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 Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-39166

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

pimcore/pimcore fixed: 10.1.2 
Upgrade pimcore/pimcore to 10.1.2
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 pimcore/pimcore

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-39166, inspect your project dependencies for Pimcore/pimcore:

inspect dependencies for pimcore/pimcore

Analyze the terminal output to locate any version of Pimcore/pimcore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 10.1.2), 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 Pimcore/pimcore, 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

Text-values were not properly escaped before printed in the version preview. This allowed XSS by authenticated users with access to the resources.

CVE-2021-39166 Affected Pimcore/pimcore Versions

1 component(s)
Fixed Versions:
10.1.2
Product / Package Ecosystem Affected Versions Fixed Version
pimcore/pimcore
 Packagist
< 10.1.2
10.1.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pimcore/pimcore/security/advisories/GHSA-w6j8-jc36-x5q9
NVD — CVE-2021-39166 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39166
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/10170
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore

Frequently Asked Questions

What is CVE-2021-39166?
CVE-2021-39166 is a security vulnerability in Pimcore/pimcore involving Improper Neutralization of Text-Values in Object Version Preview under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Pimcore/pimcore versions are affected?
Affected versions include releases prior to 10.1.2 across affected packages: pimcore/pimcore.
What version fixes CVE-2021-39166?
Upgrading to 10.1.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pimcore/pimcore affected?
Yes, pimcore/pimcore is affected in releases prior to 10.1.2. Upgrade your dependency to 10.1.2 or later.
What is the CVSS score of CVE-2021-39166?
CVE-2021-39166 has a CVSS v3.1 base score of 8.0 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-39166?
CVE-2021-39166 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-2021-39166?
Run the dependency tree command: 'inspect dependencies for pimcore/pimcore'. 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-w6j8-jc36-x5q9",
  "modified" : "2021-09-01T18:19:02Z",
  "published" : "2021-09-01T18:22:09Z",
  "aliases" : [ "CVE-2021-39166" ],
  "summary" : "Improper Neutralization of Text-Values in Object Version Preview",
  "details" : "Text-values were not properly escaped before printed in the version preview. This allowed XSS by authenticated users with access to the resources. ",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pimcore/pimcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "10.1.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 10.1.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/security/advisories/GHSA-w6j8-jc36-x5q9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-39166"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/10170"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pimcore/pimcore"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-09-01T18:19:02Z",
    "nvd_published_at" : "2021-09-01T14:15:00Z"
  }
}