CVE-2021-39189: Pimcore/pimcore Observable Response Discrepancy Vulnerability

MODERATE
Advisory Identifier: GHSA-579x-cjvr-cqj9
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CVSS 5.3
CWE-204 CWE-203
Published
Advisory Summary

CVE-2021-39189 is a MODERATE (CVSS 5.3) observable response discrepancy vulnerability (CWE-204: Observable Response Discrepancy) affecting Pimcore/pimcore libraries in the Packagist ecosystem. The issue involves observable response discrepancy in lost password service. Remediation is available by upgrading affected packages to version 10.1.3.

CVE-2021-39189 at a Glance

CVE Identifier CVE-2021-39189
GHSA Identifier GHSA-579x-cjvr-cqj9
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-204: Observable Response Discrepancy
Affected Product Pimcore/pimcore
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:N/S:U/C:L/I:N/A:N).

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

How to Fix CVE-2021-39189

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: 10.1.3 
Upgrade pimcore/pimcore to 10.1.3
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-2021-39189, 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 10.1.3), 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-204: Observable Response Discrepancy, where the product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. 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

### Impact It is possible to enumerate usernames via the forgot password functionality ### Patches Update to version `10.1.3` or apply this patch manually: https://github.com/pimcore/pimcore/pull/10223.patch ### Workarounds Apply https://github.com/pimcore/pimcore/pull/10223.patch manually.

CVE-2021-39189 Affected Pimcore/pimcore Versions

1 component(s)
Fixed Versions:
10.1.3
Product / Package Ecosystem Affected Versions Fixed Version
pimcore/pimcore
 Packagist
< 10.1.3
10.1.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pimcore/pimcore/security/advisories/GHSA-579x-cjvr-cqj9
NVD — CVE-2021-39189 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39189
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/10223.patch
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/10223/commits/d0a4de39cf05dce6af71f8ca039132bdfcbb0dce
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore
huntr.dev/bounties/12462a99-e... WEB
https://huntr.dev/bounties/12462a99-ebf8-4e39-80b3-54a16caa3f4c

Frequently Asked Questions

What is CVE-2021-39189?
CVE-2021-39189 is a security vulnerability in Pimcore/pimcore involving Observable Response Discrepancy in Lost Password Service under CWE-204: Observable Response Discrepancy.
Which Pimcore/pimcore versions are affected?
Affected versions include releases prior to 10.1.3 across affected packages: pimcore/pimcore.
What version fixes CVE-2021-39189?
Upgrading to 10.1.3 (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 10.1.3. Upgrade your dependency to 10.1.3 or later.
What is the CVSS score of CVE-2021-39189?
CVE-2021-39189 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2021-39189?
CVE-2021-39189 is classified under CWE-204: Observable Response Discrepancy (The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.).
How can I check Packagist dependencies for CVE-2021-39189?
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-579x-cjvr-cqj9",
  "modified" : "2021-09-17T18:38:47Z",
  "published" : "2021-09-20T19:53:55Z",
  "aliases" : [ "CVE-2021-39189" ],
  "summary" : "Observable Response Discrepancy in Lost Password Service",
  "details" : "### Impact\nIt is possible to enumerate usernames via the forgot password functionality\n\n### Patches\nUpdate to version `10.1.3` or apply this patch manually: https://github.com/pimcore/pimcore/pull/10223.patch\n\n### Workarounds\nApply https://github.com/pimcore/pimcore/pull/10223.patch manually. \n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pimcore/pimcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "10.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/security/advisories/GHSA-579x-cjvr-cqj9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-39189"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/10223.patch"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/10223/commits/d0a4de39cf05dce6af71f8ca039132bdfcbb0dce"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pimcore/pimcore"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/12462a99-ebf8-4e39-80b3-54a16caa3f4c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-203", "CWE-204" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-09-17T18:38:47Z",
    "nvd_published_at" : "2021-09-15T14:15:00Z"
  }
}