CVE-2023-5968: Github.com/mattermost/mattermost server/v6 Mattermost Password Hash Disclosure Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-r67m-mf7v-qp7j
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CVSS 4.9
CWE-116 CWE-200
Published
Advisory Summary

CVE-2023-5968 is a MODERATE (CVSS 4.9) mattermost password hash disclosure vulnerability vulnerability (CWE-116: Improper Encoding or Escaping of Output) affecting Github.com/mattermost/mattermost server/v6 libraries in the Go ecosystem. The issue involves mattermost password hash disclosure vulnerability. Remediation is available by upgrading affected packages to version 7.8.12, 8.0.4, 8.1.3, 9.0.1, 8.0.0-20230825233148-f787fd63368a, 5.3.2-0.20230825233148-f787fd63368a.

CVE-2023-5968 at a Glance

CVE Identifier CVE-2023-5968
GHSA Identifier GHSA-r67m-mf7v-qp7j
Severity MODERATE
CVSS v3.1 Base Score 4.9
CWE Classification CWE-116: Improper Encoding or Escaping of Output
Affected Product Github.com/mattermost/mattermost server/v6
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 4.9

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

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

How to Fix CVE-2023-5968

To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost server/v6 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/mattermost/mattermost-server/v6 fixed: 7.8.12 
Upgrade github.com/mattermost/mattermost-server/v6 to 7.8.12
github.com/mattermost/mattermost/server/v8 fixed: 8.0.4 
Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.4
github.com/mattermost/mattermost/server/v8 fixed: 8.1.3 
Upgrade github.com/mattermost/mattermost/server/v8 to 8.1.3
github.com/mattermost/mattermost/server/v8 fixed: 9.0.1 
Upgrade github.com/mattermost/mattermost/server/v8 to 9.0.1
github.com/mattermost/mattermost/server/v8 fixed: 8.0.0-20230825233148-f787fd63368a 
Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20230825233148-f787fd63368a
github.com/mattermost/mattermost-server/v6 fixed: 5.3.2-0.20230825233148-f787fd63368a 
Upgrade github.com/mattermost/mattermost-server/v6 to 5.3.2-0.20230825233148-f787fd63368a
github.com/mattermost/mattermost-server/v5 fixed: 5.3.2-0.20230825233148-f787fd63368a 
Upgrade github.com/mattermost/mattermost-server/v5 to 5.3.2-0.20230825233148-f787fd63368a
github.com/mattermost/mattermost-server fixed: 5.3.2-0.20230825233148-f787fd63368a 
Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20230825233148-f787fd63368a
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 github.com/mattermost/mattermost-server/v6

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-5968, inspect your project dependencies for Github.com/mattermost/mattermost server/v6:

inspect dependencies for github.com/mattermost/mattermost-server/v6

Analyze the terminal output to locate any version of Github.com/mattermost/mattermost server/v6 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.8.12), 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 Github.com/mattermost/mattermost server/v6, 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

Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body. 

CVE-2023-5968 Affected Github.com/mattermost/mattermost server/v6 Versions

8 component(s)
Fixed Versions:
7.8.128.0.48.1.39.0.18.0.0-20230825233148-f787fd63368a5.3.2-0.20230825233148-f787fd63368a
Product / Package Ecosystem Affected Versions Fixed Version
github.com/mattermost/mattermost-server/v6
golang/github.com/mattermost/mattermost-server/v6
Go
≥ 5.4.0-rc1
< 7.8.12
7.8.12
github.com/mattermost/mattermost/server/v8
golang/github.com/mattermost/mattermost/server/v8
Go
≥ 8.0.0
< 8.0.4
8.0.4
github.com/mattermost/mattermost/server/v8
golang/github.com/mattermost/mattermost/server/v8
Go
≥ 8.1.0
< 8.1.3
8.1.3
github.com/mattermost/mattermost/server/v8
golang/github.com/mattermost/mattermost/server/v8
Go
≥ 9.0.0
< 9.0.1
All 1 versions
9.0.0
9.0.1
github.com/mattermost/mattermost/server/v8
golang/github.com/mattermost/mattermost/server/v8
Go
< 8.0.0-20230825233148-f787fd63368a
8.0.0-20230825233148-f787fd63368a
github.com/mattermost/mattermost-server/v6
golang/github.com/mattermost/mattermost-server/v6
Go
< 5.3.2-0.20230825233148-f787fd63368a
5.3.2-0.20230825233148-f787fd63368a
github.com/mattermost/mattermost-server/v5
golang/github.com/mattermost/mattermost-server/v5
Go
< 5.3.2-0.20230825233148-f787fd63368a
5.3.2-0.20230825233148-f787fd63368a
github.com/mattermost/mattermost-server
golang/github.com/mattermost/mattermost-server
Go
< 5.3.2-0.20230825233148-f787fd63368a
5.3.2-0.20230825233148-f787fd63368a

References

NVD — CVE-2023-5968 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-5968
Github.com/mattermost/mattermost server/v6 Source Repository REPOSITORY
https://github.com/mattermost/mattermost/pull/24362
Github.com/mattermost/mattermost server/v6 Source Repository REPOSITORY
https://github.com/mattermost/mattermost/pull/24566
Security Fix Commit FIX COMMIT
https://github.com/mattermost/mattermost/commit/698f4a97da564e2c1f2bf1fbd01755cefa3b7881
Github.com/mattermost/mattermost server/v6 Source Repository REPOSITORY
https://github.com/mattermost/mattermost
Github.com/mattermost/mattermost server/v6 Security Information SECURITY
https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2023-5968?
CVE-2023-5968 is a security vulnerability in Github.com/mattermost/mattermost server/v6 involving Mattermost password hash disclosure vulnerability under CWE-116: Improper Encoding or Escaping of Output.
Which Github.com/mattermost/mattermost server/v6 versions are affected?
Affected versions include releases prior to 7.8.12, 8.0.4, 8.1.3, 9.0.1, 8.0.0-20230825233148-f787fd63368a, 5.3.2-0.20230825233148-f787fd63368a across affected packages: github.com/mattermost/mattermost-server/v6, github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server/v5, github.com/mattermost/mattermost-server.
What version fixes CVE-2023-5968?
Upgrading to 7.8.12, 8.0.4, 8.1.3, 9.0.1, 8.0.0-20230825233148-f787fd63368a, 5.3.2-0.20230825233148-f787fd63368a (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/mattermost/mattermost-server/v6 affected?
Yes, github.com/mattermost/mattermost-server/v6 is affected in releases prior to 7.8.12, 5.3.2-0.20230825233148-f787fd63368a. Upgrade your dependency to 7.8.12, 5.3.2-0.20230825233148-f787fd63368a or later.
Is github.com/mattermost/mattermost/server/v8 affected?
Yes, github.com/mattermost/mattermost/server/v8 is affected in releases prior to 8.0.4, 8.1.3, 9.0.1, 8.0.0-20230825233148-f787fd63368a. Upgrade your dependency to 8.0.4, 8.1.3, 9.0.1, 8.0.0-20230825233148-f787fd63368a or later.
What is the CVSS score of CVE-2023-5968?
CVE-2023-5968 has a CVSS v3.1 base score of 4.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2023-5968?
CVE-2023-5968 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 Go dependencies for CVE-2023-5968?
Run the dependency tree command: 'inspect dependencies for github.com/mattermost/mattermost-server/v6'. 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-r67m-mf7v-qp7j",
  "modified" : "2025-07-22T17:17:20Z",
  "published" : "2023-11-06T18:30:19Z",
  "aliases" : [ "CVE-2023-5968" ],
  "summary" : "Mattermost password hash disclosure vulnerability",
  "details" : "Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body. ",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
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    },
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    },
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    },
    "ranges" : [ {
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      }, {
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      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/mattermost/mattermost-server/v5"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
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      }, {
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  }, {
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      }, {
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      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-5968"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/pull/24362"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/pull/24566"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/commit/698f4a97da564e2c1f2bf1fbd01755cefa3b7881"
  }, {
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    "url" : "https://github.com/mattermost/mattermost"
  }, {
    "type" : "WEB",
    "url" : "https://mattermost.com/security-updates"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-116", "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-08T14:58:02Z",
    "nvd_published_at" : "2023-11-06T16:15:42Z"
  }
}