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Mattermost Confluence Plugin has Improper Validation of Specified Type of Input

High severity GitHub Reviewed Published Aug 11, 2025 to the GitHub Advisory Database • Updated Aug 12, 2025

Package

gomod github.com/mattermost/mattermost-plugin-confluence (Go)

Affected versions

< 1.5.0

Patched versions

1.5.0

Description

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.

References

Published by the National Vulnerability Database Aug 11, 2025
Published to the GitHub Advisory Database Aug 11, 2025
Reviewed Aug 12, 2025
Last updated Aug 12, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(23rd percentile)

Weaknesses

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. Learn more on MITRE.

CVE ID

CVE-2025-54525

GHSA ID

GHSA-3cg3-3mmr-w8hj

Source code

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