Arbitrary file upload in Class.upload.php
CVE-2023-6551
As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. Developers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. The README has been updated to include these guidelines.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Class.upload.php — versions 0
- Verot Class.upload.php
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cert.pl/posts/2024/01/CVE-2023-6551 (Third Party Advisory, third-party-advisory)
- cert.pl/en/posts/2024/01/CVE-2023-6551 (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-6551?
- CVE-2023-6551 is a medium-severity vulnerability in Class.upload.php, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.4/10. Published 2024-01-04.
- How severe is CVE-2023-6551?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2023-6551 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.