Mattermost <=10.5.5 Guest User Bypass: Improper Retrieval of RequestorInfo in Playbooks Handler
CVE-2025-3228 Published on June 20, 2025
Unauthorized Guest user access to Playbook
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run.
Vulnerability Analysis
CVE-2025-3228 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2025-3228 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2025-3228
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Affected Versions
Mattermost:- Version 10.5.0, <= 10.5.5 is affected.
- Version 9.11.0, <= 9.11.15 is affected.
- Version 10.8.0 is affected.
- Version 10.7.0, <= 10.7.2 is affected.
- Version 10.6.0, <= 10.6.5 is affected.
- Version 10.9.0 is unaffected.
- Version 10.5.6 is unaffected.
- Version 9.11.16 is unaffected.
- Version 10.8.1 is unaffected.
- Version 10.7.3 is unaffected.
- Version 10.6.6 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.