CVE-2023-6551

5.4 mediumEPSS 0.4%

Medium (5.4) in verot class.upload.php. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2024-01-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

verot:class.upload.php

References

https://cert.pl/en/posts/2024/01/CVE-2023-6551
https://cert.pl/posts/2024/01/CVE-2023-6551
https://cert.pl/en/posts/2024/01/CVE-2023-6551
https://cert.pl/posts/2024/01/CVE-2023-6551

Check your stack JSON