CVE-2023-7113 Mattermost Cross-site Scripting vulnerability
Attackers can inject malicious markup into channel mentions, potentially executing scripts in the web client to compromise user accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-7113?
CVE-2023-7113 is a low-severity cross-site scripting vulnerability in Mattermost Mattermost Server, published on 29 Dec 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Mattermost version 8.1.6 and earlier fails to sanitize channel mention data in posts, which allows an attacker to inject markup in the web client.
Weakness: CWE-79
Which versions are affected by CVE-2023-7113?
7 open source packages ship an affected version, including github.com/mattermost/mattermost/server/v8, mattermost and github.com/mattermost/mattermost-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/mattermost/mattermost/server/v8 Go | All versions | None |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.1.7 |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.1.7 |
mattermost Bitnami | All versions | 8.1.7 |
github.com/mattermost/mattermost-server Go | All versions | None |
github.com/mattermost/mattermost-server/v5 Go | All versions | None |
1 more packages
github.com/mattermost/mattermost-server/v6 Go | All versions | None |
Products include Mattermost Mattermost Server.
How do I fix CVE-2023-7113?
Upgrade github.com/mattermost/mattermost/server/v8 to 8.1.7 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-7113 being exploited?
There is no known exploitation of CVE-2023-7113 in the wild and no public exploit code.
Other vulnerabilities in Mattermost Mattermost Server
- CVE-2025-12419 Account takeover on OAuth/OpenID-enabled servers
- CVE-2025-12421 Account Takeover via Code Exchange Endpoint
- CVE-2025-4981 Path Traversal Leading to RCE by Any Authenticated Mattermost User
- CVE-2025-20051 Arbitrary file read via block duplication in Mattermost Boards
- CVE-2025-25279 Arbitrary file read in Mattermost Boards via import & export board archive
Sources
Also known as BIT-mattermost-2023-7113, GHSA-h3gq-j7p9-x3p4, GO-2024-2446.