CVE-2024-1952: Github.com/mattermost/mattermost/server/v8 Mattermost Incorrectly Allows Access Individual Vulnerability

LOW
Advisory Identifier: GHSA-r4fm-g65h-cr54
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CVSS 3.1
CWE-200
Published
Advisory Summary

CVE-2024-1952 is a LOW (CVSS 3.1) mattermost incorrectly allows access individual vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Github.com/mattermost/mattermost/server/v8 libraries in the Go ecosystem. The issue involves mattermost incorrectly allows access individual posts. Remediation is available by upgrading affected packages to version 9.4.0.

CVE-2024-1952 at a Glance

CVE Identifier CVE-2024-1952
GHSA Identifier GHSA-r4fm-g65h-cr54
Severity LOW
CVSS v3.1 Base Score 3.1
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Github.com/mattermost/mattermost/server/v8
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 3.1

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
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-2024-1952

To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost/server/v8 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/v8 fixed: 9.4.0 
Upgrade github.com/mattermost/mattermost/server/v8 to 9.4.0
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/v8

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-1952, inspect your project dependencies for Github.com/mattermost/mattermost/server/v8:

inspect dependencies for github.com/mattermost/mattermost/server/v8

Analyze the terminal output to locate any version of Github.com/mattermost/mattermost/server/v8 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.4.0), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Github.com/mattermost/mattermost/server/v8, 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 version 8.1.x before 8.1.9 fails to sanitize data associated with permalinks when a plugin updates an ephemeral post, allowing an authenticated attacker who can control the ephemeral post update to access individual posts' contents in channels they are not a member of.

CVE-2024-1952 Affected Github.com/mattermost/mattermost/server/v8 Versions

1 component(s)
Fixed Versions:
9.4.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/mattermost/mattermost/server/v8
golang/github.com/mattermost/mattermost/server/v8
Go
≥ 9.0.0
< 9.4.0
9.4.0

References

NVD — CVE-2024-1952 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-1952
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-r4fm-g65h-cr54
Github.com/mattermost/mattermost/server/v8 Source Repository REPOSITORY
https://github.com/mattermost/mattermost
Github.com/mattermost/mattermost/server/v8 Security Information SECURITY
https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2024-1952?
CVE-2024-1952 is a security vulnerability in Github.com/mattermost/mattermost/server/v8 involving Mattermost incorrectly allows access individual posts under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Github.com/mattermost/mattermost/server/v8 versions are affected?
Affected versions include releases prior to 9.4.0 across affected packages: github.com/mattermost/mattermost/server/v8.
What version fixes CVE-2024-1952?
Upgrading to 9.4.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/mattermost/mattermost/server/v8 affected?
Yes, github.com/mattermost/mattermost/server/v8 is affected in releases prior to 9.4.0. Upgrade your dependency to 9.4.0 or later.
What is the CVSS score of CVE-2024-1952?
CVE-2024-1952 has a CVSS v3.1 base score of 3.1 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2024-1952?
CVE-2024-1952 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Go dependencies for CVE-2024-1952?
Run the dependency tree command: 'inspect dependencies for github.com/mattermost/mattermost/server/v8'. 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-r4fm-g65h-cr54",
  "modified" : "2024-09-06T21:40:17Z",
  "published" : "2024-02-29T12:31:06Z",
  "aliases" : [ "CVE-2024-1952" ],
  "summary" : "Mattermost incorrectly allows access individual posts",
  "details" : "Mattermost version 8.1.x before 8.1.9 fails to sanitize data associated with permalinks when a plugin updates an ephemeral post, allowing an authenticated attacker who can control the ephemeral post update to access individual posts' contents in channels they are not a member of.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/mattermost/mattermost/server/v8"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-1952"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-r4fm-g65h-cr54"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mattermost/mattermost"
  }, {
    "type" : "WEB",
    "url" : "https://mattermost.com/security-updates"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-02-29T22:49:30Z",
    "nvd_published_at" : "2024-02-29T11:15:08Z"
  }
}