CWE
400
Advisory Published
Updated

CVE-2023-5522: Mobile app freezes when receiving a post with hundreds of emojis

First published: Tue Oct 17 2023(Updated: )

Mattermost Mobile fails to limit the maximum number of Markdown elements in a post allowing an attacker to send a post with hundreds of emojis to a channel and freeze the mobile app of users when viewing that particular channel. 

Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com

Affected SoftwareAffected VersionHow to fix
Mattermost Mattermost<2.8.0
Mattermost Mattermost<2.8.0

Remedy

Update Mattermost Mobile to versions 2.8.0 or higher.

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Frequently Asked Questions

  • What is the vulnerability ID of this Mattermost Mobile vulnerability?

    The vulnerability ID of this Mattermost Mobile vulnerability is CVE-2023-5522.

  • What is the severity of CVE-2023-5522?

    The severity of CVE-2023-5522 is medium with a CVSS score of 4.3.

  • What is the affected software for CVE-2023-5522?

    The affected software for CVE-2023-5522 is Mattermost Mobile on Android (up to version 2.8.0) and Mattermost Mobile on iPhone OS (up to version 2.8.0).

  • How does this vulnerability impact users of Mattermost Mobile?

    This vulnerability allows an attacker to send a post with hundreds of emojis to a channel, which can freeze the mobile app of users when viewing that particular channel.

  • How can I fix this vulnerability in Mattermost Mobile?

    To fix this vulnerability, users should update their Mattermost Mobile app to a version higher than 2.8.0.

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