CVE-2023-34840 in angular-ui-notification
Summary
by MITRE • 06/30/2023
angular-ui-notification v0.1.0, v0.2.0, and v0.3.6 was discovered to contain a cross-site scripting (XSS) vulnerability.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 07/17/2025
The vulnerability identified as CVE-2023-34840 affects angular-ui-notification versions 0.1.0, 0.2.0, and 0.3.6, presenting a critical cross-site scripting vulnerability that poses significant security risks to web applications utilizing this notification library. This issue stems from inadequate input validation and sanitization within the notification component, allowing malicious actors to inject arbitrary JavaScript code through crafted user inputs. The vulnerability specifically impacts web applications that implement the angular-ui-notification library for displaying alerts, messages, or notifications to users, creating an attack surface where user-controllable data can be improperly processed and executed in the browser context of other users. The affected versions represent widely used notification components in angular-based web applications, making this vulnerability particularly concerning for organizations with extensive angular application deployments.
The technical flaw manifests when the notification library processes user-provided content without proper sanitization, enabling attackers to inject malicious scripts through notification messages, titles, or other configurable parameters. This vulnerability aligns with CWE-79, which defines cross-site scripting as the failure to sanitize user input before incorporating it into web pages. The flaw operates by bypassing standard security mechanisms that should prevent execution of malicious code when rendering notifications, allowing attackers to exploit the library's insufficient validation routines. The XSS vulnerability can be triggered through various vectors including notification titles, message content, or even URL parameters that are passed to the notification system. Attackers can leverage this weakness to execute malicious scripts in the context of other users' browsers, potentially leading to session hijacking, credential theft, or data exfiltration.
The operational impact of CVE-2023-34840 extends beyond simple script execution, as it can enable attackers to perform sophisticated attacks such as cookie theft, session manipulation, and redirection to malicious domains. When exploited, the vulnerability can allow attackers to impersonate legitimate users within the affected applications, potentially gaining unauthorized access to sensitive data or performing unauthorized actions. The attack surface is particularly broad since angular-ui-notification is commonly used across various web applications, making the vulnerability potentially exploitable in multiple environments. Organizations using affected versions may experience unauthorized access to user sessions, data breaches, and potential compromise of entire application environments. The vulnerability's exploitation can occur without requiring user interaction beyond viewing the malicious notification, making it particularly dangerous in environments where notifications are frequently displayed to users.
Mitigation strategies for CVE-2023-34840 primarily focus on immediate version upgrades to patched releases of angular-ui-notification, as recommended by the maintainers and security vendors. Organizations should conduct comprehensive vulnerability assessments to identify all applications using the affected library versions and prioritize remediation efforts accordingly. The implementation of proper input sanitization and output encoding mechanisms should be enforced within applications that utilize this library, ensuring that all user-controllable data is properly escaped before being processed by the notification system. Security teams should also consider implementing content security policies that restrict script execution within notification contexts, providing an additional layer of protection against exploitation attempts. Regular security audits and dependency monitoring should be established to prevent similar vulnerabilities from being introduced through third-party libraries, aligning with ATT&CK technique T1584 which emphasizes the importance of maintaining secure software dependencies. Organizations should also implement web application firewalls and monitoring systems to detect and prevent exploitation attempts targeting this vulnerability.