CVE-2025-22296 in Hash Elements Plugin
Summary
by MITRE • 01/07/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in HashThemes Hash Elements.This issue affects Hash Elements: from n/a through 1.4.9.
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Analysis
by VulDB Data Team • 06/10/2025
This cross-site scripting vulnerability in HashThemes Hash Elements represents a critical web application security flaw that allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability stems from inadequate input validation and sanitization during the web page generation process, specifically when handling user-provided data that gets rendered into HTML content. According to CWE-79, this falls under the category of Cross-Site Scripting where insufficient neutralization of input data creates opportunities for attackers to execute arbitrary JavaScript code in the context of the victim's browser. The affected version range from n/a through 1.4.9 indicates that this flaw has existed for an extended period without proper mitigation, making it a persistent threat to users of the Hash Elements plugin.
The technical implementation of this vulnerability occurs when the plugin fails to properly escape or sanitize user input before incorporating it into dynamically generated web pages. When users submit content or interact with elements that are then processed and displayed on web pages, the application does not adequately filter or encode special characters that could be interpreted as HTML or JavaScript commands. This allows an attacker to craft malicious payloads that get executed in the browsers of other users who view the affected web pages. The vulnerability operates at the presentation layer where input data transitions from user interaction to web page rendering, making it particularly dangerous as it can be exploited through various user-facing interfaces within the plugin's functionality.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform a wide range of malicious activities including session hijacking, credential theft, data exfiltration, and defacement of web pages. Attackers can leverage this vulnerability to steal cookies, access user sessions, redirect victims to malicious sites, or inject additional malicious content that persists on the affected website. The attack surface is broad given that the vulnerability affects web page generation processes where user input is processed, potentially compromising not just individual user sessions but entire website security postures. This aligns with ATT&CK technique T1531 which involves using vulnerabilities to gain access to credentials and T1566 which covers social engineering through malicious input.
Mitigation strategies for this XSS vulnerability must address both immediate remediation and long-term prevention measures. The most effective immediate solution involves implementing proper input sanitization and output encoding techniques to ensure that any user-provided data is properly escaped before being rendered in web pages. This includes using context-appropriate encoding methods such as HTML entity encoding, JavaScript escaping, and URL encoding based on the specific context where the data will be displayed. Additionally, implementing Content Security Policy (CSP) headers can provide an additional layer of protection by restricting the sources from which scripts can be loaded and executed. Organizations should also establish secure coding practices that emphasize input validation, output encoding, and regular security testing to prevent similar vulnerabilities from emerging in future development cycles. Regular updates and patch management procedures are essential to ensure that all users of the Hash Elements plugin are protected against this and similar cross-site scripting threats.