CVE-2026-23841 represents a critical vulnerability affecting the Leepeuker Movary web application, which is designed for tracking and rating movie watch histories. This vulnerability allows attackers to exploit cross-site scripting (XSS) due to insufficient input validation in versions prior to 0.70.0. The vulnerable parameter identified is ?categoryCreated=. Version 0.70.0 addresses this issue, making it critical for organizations using earlier versions to update their applications.
The vulnerability has been assigned a CVSS score of 9.3, categorizing it as critical. This score indicates a significant risk to organizations that utilize the affected software. The attack vector is classified as network-based, with low complexity, no privileges required, and requiring user interaction for exploitation.
Risk to organizations includes potential unauthorized access to user data and the ability for attackers to execute scripts in the context of a user’s session, leading to data theft or further compromises. Organizations should prioritize patching immediately to mitigate this risk.
As of now, there is no known public exploit for this vulnerability, but organizations should remain vigilant and ensure they are using the latest version of Movary to avoid potential threats.
Vulnerability Details
Movary is a web application designed to track, rate, and explore movie watch history. The insufficient input validation allows for cross-site scripting attacks, which can enable attackers to execute arbitrary scripts on a victim's browser session. The specific parameter vulnerable to exploitation is ?categoryCreated=. The issue has been resolved in version 0.70.0.
The CVSS score for this vulnerability is 9.3, indicating a critical severity level. The primary factors contributing to this score include the attack vector being network-based, low attack complexity, and high impacts on both confidentiality and integrity.
Technical Analysis
The root cause of this vulnerability lies in insufficient input validation, which fails to adequately sanitize user input before processing it. Attackers can leverage this weakness by submitting crafted inputs to the vulnerable parameter, leading to XSS attacks.
The attack vector is network-based, meaning it can be executed remotely without the need for physical access to the system. The attack complexity is low, as it does not require any advanced skills, and no privileges are needed to exploit this vulnerability. However, user interaction is required, as the victim must be tricked into clicking on a malicious link.
The impacts on confidentiality and integrity are rated as high, indicating that sensitive user data can be compromised, and the integrity of the application can be significantly affected. However, there is no impact on availability.
Risk & Impact Analysis
Organizations utilizing Movary are at substantial risk due to this vulnerability. Attackers can exploit this to gain unauthorized access to user sessions, leading to potential data theft and manipulation. The urgency for remediation is critical, especially given the high CVSS score and the potential for exploitation.
The blast radius of this vulnerability can be significant, as it affects all versions prior to 0.70.0, potentially impacting a wide range of users. Given the critical severity, organizations should prioritize this vulnerability in their patch management processes.
Organizations should also monitor for suspicious activities that may indicate attempts to exploit this vulnerability. Regular security assessments and penetration testing can help identify similar weaknesses in their applications.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Movary are all versions prior to 0.70.0. Organizations using these versions should upgrade to the latest version promptly to mitigate the identified risks.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to Movary version 0.70.0 or later. If an immediate upgrade is not possible, organizations should implement strict input validation and output encoding for user inputs to mitigate the risk of XSS.
Monitoring for unusual user activity and implementing web application firewalls to filter out potentially malicious requests can also enhance security. For further information on best practices, organizations can refer to the application security assessment services offered by AppSecure.
Detection Guidance
Organizations should monitor logs for indicators of XSS attempts, such as unexpected script tags in user inputs. Behavioral anomalies, such as unusual spikes in user activity or reports of strange behavior from users, should also trigger investigation.
Establishing network signatures to detect potential exploitation attempts can be beneficial. Additionally, any changes to system files or configurations should be closely monitored to identify unauthorized modifications.
AppSecure Threat Intelligence Insight
CVE-2026-23841 highlights the ongoing challenge of input validation in web applications. This vulnerability underscores the importance of rigorous validation processes to prevent XSS attacks. Security teams are encouraged to conduct regular code reviews and security assessments to identify and remediate similar vulnerabilities.
Additionally, organizations should consider implementing a penetration testing program as part of their security strategy to proactively identify and address vulnerabilities.
The low EPSS score indicates that while the immediate threat may not be high, the critical nature of the CVSS score emphasizes the need for prompt action to safeguard user data.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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