CVE-2025-23903 in Local Shipping Labels for WooCommerce Plugin
Summary
by MITRE • 03/03/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NotFound Local Shipping Labels for WooCommerce allows Reflected XSS. This issue affects Local Shipping Labels for WooCommerce: from n/a through 1.0.0.
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Analysis
by VulDB Data Team • 03/03/2025
This vulnerability represents a critical cross-site scripting flaw that exploits improper input sanitization during web page generation within the NotFound Local Shipping Labels for WooCommerce plugin. The reflected XSS vulnerability occurs when user-supplied input is not adequately neutralized before being incorporated into dynamically generated web pages, creating an avenue for malicious actors to inject executable scripts into the browser of unsuspecting users. The vulnerability specifically impacts versions of the plugin ranging from the initial release through version 1.0.0, indicating a persistent flaw that has not been addressed in the affected release cycle.
The technical implementation of this vulnerability stems from the plugin's failure to properly validate and sanitize user input parameters that are subsequently reflected back to users within the generated web pages. When attackers craft malicious input payloads and direct users to specific URLs containing these inputs, the plugin processes them without sufficient sanitization, allowing the malicious scripts to execute in the victim's browser context. This creates a dangerous attack surface where attackers can leverage the reflected nature of the vulnerability to deliver malicious payloads that persist only during the user session and are reflected from the server response back to the browser.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and redirection to malicious sites. Attackers can craft targeted payloads that exploit the vulnerability through social engineering tactics, such as sending malicious links via email or posting them in forums where users might click through. The reflected nature of the vulnerability means that the attack vector requires user interaction, but once triggered, the malicious scripts can operate with the privileges of the victim's browser session, potentially compromising sensitive user data and administrative functions within the WordPress environment.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms throughout the plugin's codebase. The recommended approach involves applying strict sanitization routines to all user-supplied inputs before they are processed or rendered in web pages, utilizing proper HTML escaping techniques for dynamic content generation, and implementing Content Security Policy headers to limit script execution. Organizations should also consider applying immediate patches or updates to the plugin once available, while monitoring for any signs of exploitation attempts. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and maps to ATT&CK technique T1566.001 for initial access through spearphishing attachments or links, emphasizing the importance of both defensive measures and user awareness training to prevent successful exploitation attempts.