4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-24920

CVE-2025-24920: Mattermost Fails to Restrict Bookmark Creation and Updates in Archived Channels

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels

(GitHub Advisory)

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CVE-2025-24920

CVE-2025-24920:

4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/mattermost/mattermost/server/v8	go
github.com/mattermost/mattermost/server/v8	go
github.com/mattermost/mattermost/server/v8	go
github.com/mattermost/mattermost/server/v8	go

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The provided information describes an authorization flaw in bookmark operations within archived channels but does not include specific code references, commit diffs, or function names. While the vulnerability likely exists in channel bookmark handling functions (e.g., CreateBookmark/UpdateBookmark methods in channel service logic), the absence of concrete code examples, patch details, or file paths prevents high-confidence identification of specific vulnerable functions. The root cause would typically involve missing checks for channel archival status in bookmark operation authorization logic, but without explicit code context, we cannot definitively name the affected functions.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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