CVE-2023-1421: Reflected XSS in OAuth flow completion endpoints
First published: Wed Mar 15 2023(Updated: )
A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.
Credit: responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mattermost Mattermost Server | >=5.32.0<7.7.0 |
Remedy
Update Mattermost to version v7.7 or higher.
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Reference Links
Frequently Asked Questions
What is CVE-2023-1421?
CVE-2023-1421 is a reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost.
How does CVE-2023-1421 impact Mattermost?
CVE-2023-1421 allows an attacker to send AJAX requests on behalf of the victim via a crafted link with a malicious state parameter.
What software is affected by CVE-2023-1421?
The vulnerability affects Mattermost Server versions between 5.32.0 and 7.7.0.
What is the severity of CVE-2023-1421?
CVE-2023-1421 has a severity level of medium with a CVSS score of 6.1.
How can I fix CVE-2023-1421?
To fix CVE-2023-1421, update Mattermost Server to a version higher than 7.7.0.
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