CVE-2024-29179: phpMyFAQ Stored Cross-site Scripting at File Attachments
First published: Mon Mar 25 2024(Updated: )
### Summary An attacker with admin privileges can upload an attachment containing JS code without extension and the application will render it as HTML which allows for XSS attacks. ### Details When attachments are uploaded without an extension, the application renders it as HTML by default. Therefore allowing attackers to upload .html files containing javascript code to perform XSS attacks. The direct file path to the uploaded attachment is also easily obtainable as it is made up of substrings of the file's MD5 hashes. ### PoC 1. Admin users can upload attachments containing XSS payloads in files without extensions to bypass the .html extension check.  2. Since the path of the uploaded file is built entirely on the file’s MD5 hash and the attachment directory, it is possible for an attacker to know the direct path of the uploaded file. E.g file MD5 hash: 38fff51cb7248a06d6142c6bdf846831 URL will be: http://127.0.0.1/phpmyfaq/attachments/38fff/51cb7/248a0/6d6142c6bdf846831 - /attachments - /38fff (first 5 chars of MD5 hash) - /51cb7 (next 5 chars of MD5 hash) - /248a0 (next 5 chars of MD5 hash) - /6d6142c6bdf846831 (remaining chars of MD5 hash) 3. Even though the attachment was uploaded without a file extension, it is still rendered as .html, hence triggering the XSS payload.  ### Impact This allows an attacker to execute arbitrary client side JavaScript within the context of another user's phpMyFAQ session.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/phpmyfaq/phpmyfaq | =3.2.5 | 3.2.6 |
| phpMyFAQ | =3.2.5 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-29179?
CVE-2024-29179 is a serious vulnerability due to its potential for facilitating XSS attacks with admin-level privileges.
How do I fix CVE-2024-29179?
To fix CVE-2024-29179, upgrade to phpMyFAQ version 3.2.6 or newer.
Who is affected by CVE-2024-29179?
CVE-2024-29179 affects users of phpMyFAQ version 3.2.5 and earlier.
What type of attack can be executed through CVE-2024-29179?
CVE-2024-29179 allows an attacker to execute Cross-Site Scripting (XSS) attacks by uploading malicious attachments.
Is CVE-2024-29179 a code execution vulnerability?
No, CVE-2024-29179 is specifically a Cross-Site Scripting (XSS) vulnerability and does not allow for arbitrary code execution.
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