CVE-2021-39170: Pimcore/pimcore Improper Encoding Or Escaping Of Vulnerability

HIGH
Advisory Identifier: GHSA-2v88-qq7x-xq5f
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CVSS 8.0
CWE-116 CWE-79
Published
Advisory Summary

CVE-2021-39170 is a HIGH (CVSS 8.0) improper encoding or escaping of vulnerability (CWE-116: Improper Encoding or Escaping of Output) affecting Pimcore/pimcore libraries in the Packagist ecosystem. The issue involves improper encoding or escaping of output in asset metadata component. Remediation is available by upgrading affected packages to version 10.1.2.

CVE-2021-39170 at a Glance

CVE Identifier CVE-2021-39170
GHSA Identifier GHSA-2v88-qq7x-xq5f
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-116: Improper Encoding or Escaping of Output
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-2021-39170

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-2021-39170, 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-116: Improper Encoding or Escaping of Output, where the product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. as a result, the intended structure of the message is not preserved. 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

Pimcore is an open source data & experience management platform. Prior to version 10.1.2, an authenticated user could add XSS code as a value of custom metadata on assets. There is a patch for this issue in Pimcore version 10.1.2. As a workaround, users may apply the patch manually.

CVE-2021-39170 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-2v88-qq7x-xq5f
NVD — CVE-2021-39170 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39170
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/10178
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/10178.patch
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/10206
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore
huntr.dev/bounties/c3e4cf79-a... WEB
https://huntr.dev/bounties/c3e4cf79-a4b5-4982-af27-729f66281501
huntr.dev/bounties/e4cb9cd8-8... WEB
https://huntr.dev/bounties/e4cb9cd8-89cf-427c-8d2e-37ca40099bf2

Frequently Asked Questions

What is CVE-2021-39170?
CVE-2021-39170 is a security vulnerability in Pimcore/pimcore involving Improper Encoding or Escaping of Output in Asset Metadata Component under CWE-116: Improper Encoding or Escaping of Output.
Which Pimcore/pimcore versions are affected?
Affected versions include releases prior to 10.1.2 across affected packages: pimcore/pimcore.
What version fixes CVE-2021-39170?
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-2021-39170?
CVE-2021-39170 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-2021-39170?
CVE-2021-39170 is classified under CWE-116: Improper Encoding or Escaping of Output (The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.).
How can I check Packagist dependencies for CVE-2021-39170?
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-2v88-qq7x-xq5f",
  "modified" : "2021-09-01T18:20:20Z",
  "published" : "2021-09-01T18:21:55Z",
  "aliases" : [ "CVE-2021-39170" ],
  "summary" : "Improper Encoding or Escaping of Output in Asset Metadata Component",
  "details" : "Pimcore is an open source data & experience management platform. Prior to version 10.1.2, an authenticated user could add XSS code as a value of custom metadata on assets. There is a patch for this issue in Pimcore version 10.1.2. As a workaround, users may apply the patch manually.",
  "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-2v88-qq7x-xq5f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-39170"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/10178"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/10178.patch"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/10206"
  }, {
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    "url" : "https://github.com/pimcore/pimcore"
  }, {
    "type" : "WEB",
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  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-116", "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-09-01T18:20:20Z",
    "nvd_published_at" : "2021-09-01T14:15:00Z"
  }
}