CVE-2026-2461
Missing authorization check allows unauthorized modification of other users' comments on a board
Summary
Missing authorization check allows unauthorized modification of other users' comments on a board
Original description
The description as published by the source.
Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory mattermost.com
- advisory nvd.nist.gov