CVE-2025-54525: Github.com/mattermost/mattermost plugin confluence Mattermost Confluence Plugin Has Improper Vulnerability

HIGH
Advisory Identifier: GHSA-3cg3-3mmr-w8hj
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CVSS 7.5
CWE-1287
Published
Advisory Summary

CVE-2025-54525 is a HIGH (CVSS 7.5) mattermost confluence plugin has improper vulnerability (CWE-1287: Improper Validation of Specified Type of Input) affecting Github.com/mattermost/mattermost plugin confluence libraries in the Go ecosystem. The issue involves mattermost confluence plugin has improper validation of specified type of input. Remediation is available by upgrading affected packages to version 1.5.0.

CVE-2025-54525 at a Glance

CVE Identifier CVE-2025-54525
GHSA Identifier GHSA-3cg3-3mmr-w8hj
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-1287: Improper Validation of Specified Type of Input
Affected Product Github.com/mattermost/mattermost plugin confluence
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/I:N/A:H).

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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2025-54525

To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost plugin confluence 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-plugin-confluence fixed: 1.5.0 
Upgrade github.com/mattermost/mattermost-plugin-confluence to 1.5.0
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-plugin-confluence

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-54525, inspect your project dependencies for Github.com/mattermost/mattermost plugin confluence:

inspect dependencies for github.com/mattermost/mattermost-plugin-confluence

Analyze the terminal output to locate any version of Github.com/mattermost/mattermost plugin confluence in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.5.0), 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-1287: Improper Validation of Specified Type of Input, where the product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type. In Github.com/mattermost/mattermost plugin confluence, 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 Confluence Plugin versions < 1.5.0 fail to handle unexpected request bodies, allowing attackers to crash the plugin via constant hits to the create channel subscription endpoint with an invalid request body.

CVE-2025-54525 Affected Github.com/mattermost/mattermost plugin confluence Versions

1 component(s)
Fixed Versions:
1.5.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/mattermost/mattermost-plugin-confluence
golang/github.com/mattermost/mattermost-plugin-confluence
Go
< 1.5.0
1.5.0

References

NVD — CVE-2025-54525 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-54525
Github.com/mattermost/mattermost plugin confluence Source Repository REPOSITORY
https://github.com/mattermost/mattermost-plugin-confluence
Github.com/mattermost/mattermost plugin confluence Security Information SECURITY
https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2025-54525?
CVE-2025-54525 is a security vulnerability in Github.com/mattermost/mattermost plugin confluence involving Mattermost Confluence Plugin has Improper Validation of Specified Type of Input under CWE-1287: Improper Validation of Specified Type of Input.
Which Github.com/mattermost/mattermost plugin confluence versions are affected?
Affected versions include releases prior to 1.5.0 across affected packages: github.com/mattermost/mattermost-plugin-confluence.
What version fixes CVE-2025-54525?
Upgrading to 1.5.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/mattermost/mattermost-plugin-confluence affected?
Yes, github.com/mattermost/mattermost-plugin-confluence is affected in releases prior to 1.5.0. Upgrade your dependency to 1.5.0 or later.
What is the CVSS score of CVE-2025-54525?
CVE-2025-54525 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-54525?
CVE-2025-54525 is classified under CWE-1287: Improper Validation of Specified Type of Input (The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.).
How can I check Go dependencies for CVE-2025-54525?
Run the dependency tree command: 'inspect dependencies for github.com/mattermost/mattermost-plugin-confluence'. 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-3cg3-3mmr-w8hj",
  "modified" : "2025-08-12T00:07:04Z",
  "published" : "2025-08-11T21:31:40Z",
  "aliases" : [ "CVE-2025-54525" ],
  "summary" : "Mattermost Confluence Plugin has Improper Validation of Specified Type of Input",
  "details" : "Mattermost Confluence Plugin versions < 1.5.0 fail to handle unexpected request bodies, allowing attackers to crash the plugin via constant hits to the create channel subscription endpoint with an invalid request body.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/mattermost/mattermost-plugin-confluence"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.5.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-54525"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mattermost/mattermost-plugin-confluence"
  }, {
    "type" : "WEB",
    "url" : "https://mattermost.com/security-updates"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1287" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-08-12T00:07:04Z",
    "nvd_published_at" : "2025-08-11T19:15:30Z"
  }
}