Vulnerability · Published Jan 4, 2024 · Assigned by CERT-PL

CVE-2023-6551Stored XSS in class.upload.php

Medium 5.4

In plain English

A medium-severity unrestricted file upload in class.upload.php from class.upload.php. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.4%top 62.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	verot/class.upload.php	no fix listed	GHSA-v6f4-jwv9-682w

Affected products (as reported)

Vendor	Product	Versions
class.upload.php	class.upload.php	0 – through *

Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

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