High · published December 22, 2025
⚡ An unauthenticated attacker can execute malicious requests by simply knowing a valid user ID! This vulnerability in Mattermost's Jira plugin could be a game-changer. 🔥 Think of this like a restaurant where anyone can order a meal just by knowing the name of a customer — there's no need to show identification. An attacker could craft special orders that exploit the system, potentially feeding themselves unauthorized access to sensitive information. This vulnerability could allow attackers to issue GET and POST requests to the Jira server, virtually impersonating a valid user. If exploited, they could manipulate or access sensitive project data, leading to disastrous data breaches or unauthorized changes in your Jira projects. Protecting your information is absolutely crucial!
Think of this like a restaurant where anyone can order a meal just by knowing the name of a customer — there's no need to show identification. An attacker could craft special orders that exploit the system, potentially feeding themselves unauthorized access to sensitive information. The flaw lies in the Mattermost Jira plugin, versions <=4.4.0, not enforcing proper authentication and path restrictions. This allows attackers to craft payloads that spoof user IDs and manipulate issue key paths, bypassing security checks.
This vulnerability could allow attackers to issue GET and POST requests to the Jira server, virtually impersonating a valid user. If exploited, they could manipulate or access sensitive project data, leading to disastrous data breaches or unauthorized changes in your Jira projects. Protecting your information is absolutely crucial! To remediate this, update Mattermost to versions 11.1.1, 11.0.6, 10.12.4, or 10.11.8 and ensure your Jira plugin is updated to version 4.4.1 or later. Additionally, review your configuration to restrict unauthorized access. You've got this! By taking these steps, you'll fortify your security and keep those pesky attackers at bay! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| mattermost/mattermost_server | ≥ 10.11.0, < 10.11.8 | 10.11.8 |
| mattermost/mattermost_server | ≥ 10.12.0, < 10.12.4 | 10.12.4 |
| mattermost/mattermost_server | ≥ 11.0.0, < 11.0.6 | 11.0.6 |
| mattermost/mattermost_server | ≥ 11.1.0, < 11.1.1 | 11.1.1 |