CVE-2025-22793: Bold Pagos En Linea XSS Vulnerability

CVE-2025-22793 Overview

CVE-2025-22793 is a DOM-Based Cross-Site Scripting (XSS) vulnerability affecting the Bold Pagos en Linea WordPress plugin. This vulnerability arises from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts that execute in victims' browsers. The vulnerability affects versions through 3.1.4 of the plugin, which is used for payment processing integration on WordPress sites.

Critical Impact

Attackers can execute arbitrary JavaScript in user browsers, potentially stealing session cookies, redirecting users to malicious sites, defacing web pages, or performing actions on behalf of authenticated users including administrators.

Affected Products

• Bold Pagos en Linea WordPress Plugin versions through 3.1.4
• WordPress sites utilizing the bold-pagos-en-linea plugin for payment processing

Discovery Timeline

• 2025-01-15 - CVE CVE-2025-22793 published to NVD
• 2026-04-29 - Last updated in NVD database

Technical Details for CVE-2025-22793

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). The DOM-Based XSS flaw occurs when user-controlled input is processed by client-side JavaScript and dynamically written to the Document Object Model (DOM) without proper sanitization. Unlike traditional reflected or stored XSS, DOM-Based XSS executes entirely within the browser, making it particularly challenging to detect through server-side security mechanisms.

The Bold Pagos en Linea plugin, which facilitates online payment processing for WordPress e-commerce sites, fails to properly validate and sanitize user input before rendering it in the browser context. This allows attackers to craft malicious URLs or manipulate DOM elements to inject executable JavaScript code.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding within the plugin's client-side JavaScript code. When processing payment-related data or user inputs, the plugin directly incorporates untrusted data into the DOM without implementing proper sanitization or encoding mechanisms. This lack of defense against malicious input enables attackers to break out of the expected data context and inject executable script content.

Attack Vector

The attack vector is network-based, requiring user interaction to exploit. An attacker would typically craft a malicious URL containing JavaScript payload parameters and distribute it through phishing campaigns, social engineering, or by embedding it in third-party websites. When a victim clicks the malicious link or visits a compromised page, the vulnerable plugin processes the tainted input and executes the attacker's script within the victim's browser session.

The exploitation scenario involves:

1. Attacker identifies the vulnerable input parameter in the Bold Pagos en Linea plugin
2. Attacker crafts a malicious URL with embedded JavaScript payload
3. Victim receives and clicks the malicious link
4. The plugin's JavaScript processes the malicious input and writes it to the DOM
5. The injected script executes with the victim's session context

For detailed technical information about this vulnerability, see the Patchstack XSS Vulnerability Advisory.

Detection Methods for CVE-2025-22793

Indicators of Compromise

• Unusual JavaScript execution patterns in browser console logs on pages using the Bold Pagos en Linea plugin
• Web server access logs showing suspicious URL parameters containing encoded script tags or JavaScript event handlers
• Reports of unexpected browser behavior, redirects, or popup windows on payment-related pages
• Cookie theft attempts or suspicious authentication token exfiltration in network traffic

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common XSS payload patterns in URL parameters and request bodies
• Implement Content Security Policy (CSP) headers to restrict inline script execution and report policy violations
• Monitor client-side JavaScript errors and console warnings for injection attempts
• Conduct regular security scanning of WordPress installations focusing on XSS vulnerabilities in payment plugins

Monitoring Recommendations

• Enable verbose logging for WordPress and the Bold Pagos en Linea plugin to capture suspicious input patterns
• Set up alerts for CSP violation reports indicating attempted script injection
• Monitor for anomalous outbound connections from client browsers that could indicate data exfiltration
• Review web analytics for unusual referrer patterns that may indicate exploitation campaigns

How to Mitigate CVE-2025-22793

Immediate Actions Required

• Audit all WordPress installations to identify instances of the Bold Pagos en Linea plugin versions 3.1.4 and earlier
• Check for available plugin updates through the WordPress admin dashboard and apply patches immediately
• Implement Content Security Policy headers to mitigate XSS impact while awaiting patches
• Consider temporarily deactivating the plugin if no patch is available and payment functionality can be handled through alternative means

Patch Information

Organizations should check for the latest version of the Bold Pagos en Linea plugin through the WordPress plugin repository. Review the Patchstack XSS Vulnerability Advisory for specific remediation guidance and patch availability details.

Workarounds

• Implement a Web Application Firewall with XSS filtering rules to block malicious payloads targeting this vulnerability
• Add strict Content Security Policy headers to prevent inline script execution: Content-Security-Policy: script-src 'self'; object-src 'none';
• Enable HTTPOnly and Secure flags on session cookies to limit the impact of potential cookie theft
• Restrict access to payment pages to authenticated users only while awaiting a patch

# WordPress .htaccess Content Security Policy configuration
<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self'; form-action 'self';"
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
</IfModule>