CVE-2019-14863 in angular
Summary
by MITRE
There is a vulnerability in all angular versions before 1.5.0-beta.0, where after escaping the context of the web application, the web application delivers data to its users along with other trusted dynamic content, without validating it.
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Analysis
by VulDB Data Team • 11/20/2025
This vulnerability represents a critical security flaw in the angular javascript framework affecting versions prior to 1.5.0-beta.0. The issue stems from insufficient input validation mechanisms that allow malicious data to be injected into the application context after escaping the web application's secure boundaries. The vulnerability creates a dangerous condition where the application delivers both legitimate user data and potentially malicious dynamic content without proper sanitization checks, effectively breaking the trust boundary between the application and its data sources.
The technical implementation of this vulnerability occurs when angular applications process user input that has been escaped or filtered through standard security mechanisms but still retains the ability to influence the application's execution context. This creates an attack surface where threat actors can manipulate the application's behavior by injecting malicious content that bypasses traditional validation controls. The flaw operates at the intersection of context escaping and dynamic content delivery, where the framework's sanitization mechanisms fail to properly validate data that has already passed initial filtering stages.
From an operational perspective, this vulnerability enables attackers to perform various malicious activities including cross-site scripting attacks, data exfiltration, and potentially full application compromise. The impact extends beyond simple script injection as the vulnerability allows for the execution of arbitrary code within the application's context, particularly when the application delivers content to users who may not be properly authenticated or authorized. This creates a significant risk for applications that handle sensitive user data or perform critical business functions.
The vulnerability aligns with CWE-79 which addresses cross-site scripting flaws, and can be mapped to ATT&CK technique T1211 for lateral movement through command execution. Organizations should immediately upgrade to angular version 1.5.0-beta.0 or later to remediate this vulnerability, as the update includes enhanced input validation and context-aware sanitization mechanisms. Additional mitigations include implementing proper content security policies, regular security code reviews, and deploying web application firewalls to monitor for suspicious data patterns that may indicate exploitation attempts.