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XSS vulnerability previewing files uploaded to the library containing HTML/JS

Moderate
dasgarner published GHSA-336f-wrgx-57gg Sep 3, 2024

Package

composer Xibo CMS (Composer)

Affected versions

<4.1.0

Patched versions

>=4.1.0

Description

Summary

An XSS vulnerability allows authorized users to execute arbitrary JavaScript via the file preview function.

Impact

Users can upload HTML/CSS/JS files into the Xibo Library via the Generic File module to be referenced on Displays and in Layouts. This is intended functionality. When previewing these resources from the Library and Layout editor they are executed in the users browser.

This will be disabled in future releases, and users are encouraged to use the new developer tools in 4.1 to design their widgets which require this type of functionality.

Patches

This behaviour has been changed in 4.1.0 to preview previewing of generic files.

Workarounds

There are no workarounds for this issue.

References

Reporter ref: K-Xibo-2024-006 Xibo CMS Cross Site Scripting

Acknowledgements

The vulnerability was discovered by Sergey Bobrov (Kaspersky, https://kaspersky.com/)
https://github.com/BlackFan

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
Low
User interaction
Required
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:L/UI:R/S:U/C:L/I:L/A:N

CVE ID

CVE-2024-43412

Weaknesses