CVE-2025-28907 in WP Last Modified Plugin
Summary
by MITRE • 03/12/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Rahul Arora WP Last Modified allows Stored XSS. This issue affects WP Last Modified: from n/a through 0.1.
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Analysis
by VulDB Data Team • 03/12/2025
The vulnerability identified as CVE-2025-28907 represents a critical cross-site scripting flaw within the WP Last Modified WordPress plugin, specifically impacting versions ranging from the initial release through version 0.1. This weakness falls under the well-documented category of improper input neutralization during web page generation, creating a persistent security risk that allows attackers to execute malicious scripts within the context of affected user sessions. The vulnerability's classification aligns with CWE-79, which describes the improper neutralization of input during web page generation, making it a prime target for malicious actors seeking to exploit web applications.
The technical implementation of this stored cross-site scripting vulnerability occurs when the WP Last Modified plugin fails to properly sanitize user-supplied input before incorporating it into dynamically generated web pages. This failure creates an environment where malicious scripts can be permanently stored within the application's database or configuration files, subsequently executed whenever legitimate users access pages containing the compromised content. The flaw specifically affects how the plugin processes and renders metadata or user-provided information, allowing attackers to inject malicious JavaScript code that persists across multiple user interactions.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the ability to hijack user sessions, steal sensitive cookies, perform unauthorized actions on behalf of victims, and potentially escalate privileges within the affected WordPress environment. The stored nature of this XSS vulnerability means that the malicious payload remains active even after the initial injection, making it particularly dangerous for administrators and regular users who may encounter the compromised content during routine browsing activities. This persistent threat can be exploited to gain unauthorized access to administrative interfaces or to manipulate content in ways that compromise the integrity of the entire WordPress installation.
Security mitigations for this vulnerability should begin with immediate patching of the affected WP Last Modified plugin to version 0.1 or later, as this represents the first release that addresses the stored XSS flaw. System administrators should implement comprehensive input validation and output encoding mechanisms across all user-facing interfaces, ensuring that any data entering the application is properly sanitized before being stored or rendered. Additionally, the implementation of Content Security Policy headers can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded and executed within the browser environment. Organizations should also consider implementing web application firewalls and regular security scanning to detect and prevent exploitation attempts targeting this specific vulnerability category. The ATT&CK framework categorizes this vulnerability under T1059.007 for scripting languages and T1566.001 for spearphishing attachments, highlighting the multi-faceted approach required to address such threats. According to industry best practices, this vulnerability demonstrates the critical importance of input validation and output encoding in preventing XSS attacks, with the CWE-79 classification emphasizing the need for comprehensive sanitization procedures throughout the application's data processing pipeline.