A high-severity stored Cross-Site Scripting (XSS) vulnerability has been discovered in Filament, a set of full-stack components designed for accelerated Laravel development. This vulnerability affects versions 4.0.0 through 4.8.4 and 5.0.0 through 5.3.4. The issue arises from two Filament Table summarizers, namely Range and Values, which render raw database values without escaping HTML. Consequently, if validation is inadequate for the data in the columns utilizing these summarizers, an attacker could inject malicious HTML or JavaScript. This would result in stored XSS that executes for users viewing the table with these summarizers.
The risk to organizations includes potential unauthorized actions performed by users, data theft, and loss of user trust. Given the nature of the vulnerability and its potential impact, it is crucial for organizations to assess their exposure and take immediate action. This vulnerability has been patched in versions 4.8.5 and 5.3.5, and organizations using affected versions should prioritize patching immediately.
As of now, there is no public proof of concept (PoC) available, and the vulnerability is not currently listed in the Known Exploited Vulnerabilities (KEV) database. However, this does not diminish the urgency for organizations to address this vulnerability. The potential for exploitation remains significant, particularly given the XSS nature of the vulnerability.
Organizations should address this vulnerability in their priority patch cycle to safeguard against possible exploitation and ensure the integrity of their applications.
Vulnerability Details
The official description of CVE-2026-33080 indicates that the vulnerability allows attackers to inject malicious scripts into the Filament Table summarizers due to a lack of HTML escaping. The vulnerability is classified under the Common Weakness Enumeration (CWE) IDs CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) and CWE-80 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')).
The CVSS score for this vulnerability is 7.3, indicating a high severity level. The score breakdown is as follows: Attack Vector (Network), Attack Complexity (Low), Privileges Required (Low), User Interaction (Required), Confidentiality Impact (High), Integrity Impact (High), and Availability Impact (None).
Organizations should be aware that the vulnerability impacts all versions of Filament prior to 4.8.5 and 5.3.5, necessitating immediate attention to apply the relevant patches.
Technical Analysis
The root cause of this vulnerability lies in the inadequate sanitization of user-generated content within the Filament Table summarizers. Specifically, the summarizers are designed to display database values directly, which can include user inputs. Without proper validation and escaping of these inputs, malicious scripts can be injected and stored.
The attack vector for this vulnerability is network-based, requiring low attack complexity and low privileges to exploit. User interaction is required, as the stored scripts would execute when a user views the affected table. The impacts of the vulnerability are significant, with both confidentiality and integrity being highly affected.
Risk & Impact Analysis
Real-world deployment risk is critical since the vulnerability can lead to unauthorized actions, data exposure, and manipulation. Organizations utilizing Filament in their applications must assess their exposure to this vulnerability, especially if they allow user-generated inputs in the tables rendered by the summarizers.
The blast radius potential is substantial, particularly for applications widely used in public-facing environments. The urgency for organizations to address this vulnerability is high, given the CVSS score of 7.3 and the potential for exploitation through stored XSS attacks.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Filament include all releases from 4.0.0 to 4.8.4 and from 5.0.0 to 5.3.4. Users of these versions are strongly advised to upgrade to at least version 4.8.5 or 5.3.5 to mitigate this vulnerability.
Mitigation & Remediation
To remediate this vulnerability, users must upgrade to the patched versions of Filament: 4.8.5 or 5.3.5. Organizations should also review their application code to ensure that all user inputs are properly validated and escaped to prevent similar vulnerabilities in the future.
In addition to patching, organizations can implement configuration hardening and network controls to reduce the risk of exploitation. Continuous security testing can help identify similar vulnerabilities before they can be exploited.
Organizations may consider utilizing penetration testing services to validate the effectiveness of their remediation efforts.
Detection Guidance
Monitoring for unusual behavior in applications using Filament is crucial. Organizations should implement logging mechanisms to capture interactions with the Filament Table summarizers and watch for any anomalies that may indicate attempts to exploit this vulnerability.
Behavioral anomalies, such as unexpected data rendering in tables or unusual user interactions, should be flagged for review. Additionally, network signatures may be established to detect potential attack patterns associated with XSS exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-33080 highlights the ongoing challenges organizations face in securing applications that rely heavily on user-generated content. This vulnerability exemplifies the need for continuous vigilance in application security, particularly in components like Filament that are widely adopted in the Laravel ecosystem.
Security teams should take this opportunity to assess their own applications for similar vulnerabilities and ensure that proper input validation and sanitization practices are in place. Regularly reviewing and updating security measures will help mitigate risks associated with evolving threats.
For more information on maintaining application security, organizations can refer to our blog on vulnerability management programs and best practices for penetration testing methodology.
Moreover, the trends associated with vulnerabilities like CVE-2026-33080 can inform future security strategies, emphasizing the importance of proactive measures in the ever-changing landscape of web application security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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