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Mattermost Server SSRF Vulnerability via the Agents Plugin

Low severity GitHub Reviewed Published Aug 21, 2025 to the GitHub Advisory Database • Updated Aug 29, 2025

Package

gomod github.com/mattermost/mattermost-server (Go)

Affected versions

>= 10.5.0, <= 10.5.9

Patched versions

10.5.10
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20250814075248-83a37a861d3c
8.0.0-20250814075248-83a37a861d3c

Description

Mattermost Server versions 10.5.x <= 10.5.9 utilizing the Agents plugin fail to reject empty request bodies which allows users to trick users into clicking malicious links via post actions

References

Published by the National Vulnerability Database Aug 21, 2025
Published to the GitHub Advisory Database Aug 21, 2025
Reviewed Aug 21, 2025
Last updated Aug 29, 2025

Severity

Low

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
Low
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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:L/UI:R/S:U/C:N/I:L/A:N

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.
(6th percentile)

Weaknesses

Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Learn more on MITRE.

CVE ID

CVE-2025-47700

GHSA ID

GHSA-vqwh-5jhh-vc9p

Source code

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