CVE-2026-90943
Received Received - Intake

Stored XSS in Parallax Filament Comments

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: VulnCheck

Description
parallax filament-comments through 3.0.0 contains a stored cross-site scripting vulnerability in comment body rendering that allows authenticated panel users to inject malicious scripts. Attackers can store XSS payloads in comment bodies that execute in the browsers of other users viewing those comments, including administrators, enabling session token theft and unauthorized actions.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-15
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-90943
EUVD
EUVD-2026-77580

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
parallax filament-comments to 3.0.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a stored cross-site scripting (XSS) vulnerability in the parallax filament-comments package through version 3.0.0. Authenticated users can inject malicious scripts into comment bodies, which execute in the browsers of other users viewing those comments, including administrators. The issue occurs because user input is not properly sanitized before rendering.

Detection Guidance

Check for installed versions of parallax/filament-comments using Composer: composer show parallax/filament-comments. If version is 3.0.0 or below, the system is vulnerable. Inspect comment rendering in the application by viewing comment content in the browser and checking if raw HTML or scripts execute. Look for unauthorized comments with suspicious payloads in the database.

Impact Analysis

Attackers can steal session tokens, impersonate users, or perform unauthorized actions. Since administrators may view the comments, the impact includes potential privilege escalation and full account compromise. The vulnerability affects all users interacting with the comment system.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection requirements and HIPAA's security rules. It may result in data breaches, unauthorized disclosure, or loss of data integrity, requiring breach notifications and potential fines.

Mitigation Strategies

Upgrade to the latest version of parallax/filament-comments if available. Implement input sanitization for comment content using a sanitizer like Symfony's HTML Sanitizer. Review and restrict comment creation permissions to trusted users only. Monitor comments for suspicious content and remove any malicious payloads.

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