CVE-2026-33193
Stored XSS in Docmost Wiki via MIME Type Spoofing
Publication date: 2026-04-14
Last updated on: 2026-04-23
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| docmost | docmost | to 0.70.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects Docmost, an open-source collaborative wiki and documentation software. Versions prior to 0.70.0 are vulnerable to a stored cross-site scripting (XSS) attack caused by improper handling of MIME type spoofing. This flaw allows an attacker to inject malicious scripts into the application.
How can this vulnerability impact me? :
Exploitation of this vulnerability could lead to malicious scripts being executed in the context of users interacting with the Docmost software. This can compromise the security of users and data by potentially allowing attackers to steal information, hijack user sessions, or perform unauthorized actions.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade Docmost to version 0.70.0 or later, as this version contains the patch that fixes the stored cross-site scripting (XSS) issue caused by improper handling of MIME type spoofing.