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class.upload.php allows cross-site scripting attacks via uploaded files

Moderate severity GitHub Reviewed Published Jan 4, 2024 to the GitHub Advisory Database • Updated Jan 11, 2024

Package

composer verot/class.upload.php (Composer)

Affected versions

<= 2.1.6

Patched versions

None

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.

References

Published by the National Vulnerability Database Jan 4, 2024
Published to the GitHub Advisory Database Jan 4, 2024
Reviewed Jan 4, 2024
Last updated Jan 11, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS score

0.048%
(20th percentile)

Weaknesses

CVE ID

CVE-2023-6551

GHSA ID

GHSA-v6f4-jwv9-682w

Source code

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