CVE-2026-27020 in photobooth
Summary
by MITRE • 02/20/2026
Photobooth prior to 1.0.1 has a cross-site scripting (XSS) vulnerability in user input fields. Malicious users could inject scripts through unvalidated form inputs. This vulnerability is fixed in 1.0.1.
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Analysis
by VulDB Data Team • 02/21/2026
The vulnerability identified as CVE-2026-27020 affects Photobooth versions prior to 1.0.1 and represents a classic cross-site scripting flaw that resides within user input validation mechanisms. This type of vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security issues. The Photobooth application, designed for capturing and managing photographs through web interfaces, fails to properly sanitize or validate user inputs submitted through various form fields, creating an exploitable entry point for malicious actors.
The technical implementation of this vulnerability stems from inadequate input sanitization processes within the application's form handling logic. When users submit data through web forms, the application does not sufficiently validate or escape the input content before processing or storing it. This allows attackers to inject malicious script code directly into form fields that are then rendered back to other users browsing the application. The vulnerability specifically targets user input fields that are not properly escaped or validated, making it possible for attackers to execute arbitrary JavaScript code within the context of other users' browsers. The exploitation occurs when the application displays the unvalidated input without proper HTML escaping or content sanitization.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, credential theft, data exfiltration, and redirection to malicious websites. An attacker could craft malicious payloads that steal cookies, access user sessions, or redirect victims to phishing sites that mimic legitimate application interfaces. This vulnerability is particularly concerning for applications that handle user-generated content or personal information, as it creates persistent threats that can affect multiple users over time. The vulnerability's persistence means that once exploited, malicious scripts can continue to execute against subsequent users who view the affected content, creating a continuous attack surface.
The remediation for this vulnerability requires implementing comprehensive input validation and output encoding mechanisms throughout the application's codebase. The fix implemented in version 1.0.1 addresses the core issue by ensuring that all user inputs are properly sanitized and validated before being processed or displayed. This approach aligns with the OWASP Top Ten security principles and follows the principle of least privilege in input handling. Organizations should implement proper HTML escaping for all dynamic content, utilize secure coding practices for form validation, and establish robust input filtering mechanisms. Additionally, regular security testing including automated scanning and manual penetration testing should be conducted to identify similar vulnerabilities in other application components. The fix should also include implementing Content Security Policy headers to add an additional layer of protection against script injection attacks, as recommended by the ATT&CK framework's technique T1211 for defensive measures against XSS vulnerabilities.