CVE-2025-6324 in Easy Invoice Plugin
Summary
by MITRE • 12/18/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in MatrixAddons Easy Invoice easy-invoice allows DOM-Based XSS.This issue affects Easy Invoice: from n/a through <= 2.0.9.
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Analysis
by VulDB Data Team • 12/18/2025
The vulnerability identified as CVE-2025-6324 represents a critical cross-site scripting weakness within the MatrixAddons Easy Invoice plugin, specifically manifesting as a DOM-based XSS flaw that undermines web application security. This vulnerability resides in the web page generation process where input validation and sanitization mechanisms fail to properly neutralize malicious user-supplied data before it is rendered in the browser environment. The issue affects all versions of the Easy Invoice plugin up to and including version 2.0.9, indicating a widespread exposure across multiple iterations of the software. The DOM-based nature of this vulnerability means that the malicious script is executed within the document object model of the web page rather than being reflected in HTTP response headers or server-side processed content.
The technical implementation of this flaw occurs when the plugin fails to adequately sanitize or escape user input that gets incorporated into dynamic web page elements. When an attacker crafts malicious input containing script tags or other executable code, and this input is processed by the plugin's web generation logic, the malicious content can be injected directly into the DOM structure. This allows the attacker to execute arbitrary JavaScript within the context of the victim's browser session, potentially compromising user data, hijacking sessions, or performing unauthorized actions on behalf of the user. The vulnerability specifically impacts the plugin's handling of parameters or data that should be treated as safe but are instead processed without proper security controls.
The operational impact of this vulnerability extends beyond simple script execution, as it creates a persistent threat vector that can be exploited across multiple user sessions and potentially affect all users interacting with the vulnerable plugin. Attackers can leverage this weakness to perform session hijacking, steal sensitive information, redirect users to malicious websites, or inject additional malware into the victim's browsing environment. The vulnerability's presence in the web page generation process means that even legitimate users who might unknowingly interact with maliciously crafted links or forms could become victims of the attack. This creates a significant risk for businesses relying on the Easy Invoice plugin, as any compromised user session could lead to financial data theft or unauthorized access to business-critical information.
Organizations should immediately implement mitigations including updating to the latest version of the Easy Invoice plugin where the vulnerability has been addressed, implementing proper input validation and output encoding mechanisms, and deploying web application firewalls to detect and block suspicious script injection attempts. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and follows patterns commonly associated with ATT&CK technique T1566 which involves social engineering through malicious links or content. Security teams should also conduct comprehensive testing of the plugin's input handling mechanisms and establish monitoring procedures to detect potential exploitation attempts, as the DOM-based nature of the vulnerability makes it particularly challenging to detect through traditional security scanning methods.