Mattermost Playbooks Plugin up to 9.11.10/10.4.2/10.5.0/10.5.x RetrospectivePost improper validation of specified type of input

Summaryinfo

A vulnerability identified as problematic has been detected in Mattermost Playbooks Plugin up to 9.11.10/10.4.2/10.5.0/10.5.x. Affected is an unknown function of the component RetrospectivePost Handler. Performing a manipulation results in improper validation of specified type of input. This vulnerability was named CVE-2025-41395. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Mattermost Playbooks Plugin up to 9.11.10/10.4.2/10.5.0/10.5.x. This affects some unknown functionality of the component RetrospectivePost Handler. The manipulation with an unknown input leads to a improper validation of specified type of input vulnerability. CWE is classifying the issue as CWE-1287. 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. This is going to have an impact on availability. The summary by CVE is:

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to properly validate the props used by the RetrospectivePost custom post type in the Playbooks plugin, which allows an attacker to create a specially crafted post with maliciously crafted props and cause a denial of service (DoS) of the web app for all users.

The weakness was presented by C0rydoras. It is possible to read the advisory at mattermost.com. This vulnerability is uniquely identified as CVE-2025-41395 since 04/22/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 9.11.11, 10.4.3, 10.5.1 or 10.6.0 eliminates this vulnerability.

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Productinfo

Type

• Groupware Software

Vendor

• Mattermost

Name

• Playbooks Plugin

Version

• 9.11.0
• 9.11.1
• 9.11.2
• 9.11.3
• 9.11.4
• 9.11.5
• 9.11.6
• 9.11.7
• 9.11.8
• 9.11.9
• 9.11.10
• 10.0
• 10.1
• 10.2
• 10.3
• 10.4
• 10.4.0
• 10.4.1
• 10.4.2
• 10.5
• 10.5.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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