CVE-2026-94179: Razorpay Payment Button XSS Vulnerability

CVE-2026-94179 Overview

CVE-2026-94179 is an unauthenticated Cross-Site Scripting (XSS) vulnerability affecting the Razorpay Payment Button plugin for WordPress in versions <= 2.4.9. The flaw is classified under [CWE-79] (Improper Neutralization of Input During Web Page Generation). An unauthenticated attacker can inject malicious script content that executes in a victim's browser when the user interacts with a crafted request. Successful exploitation can lead to session token theft, forced browser actions, and redirection to attacker-controlled infrastructure. The vulnerability requires user interaction and can pivot into other application contexts due to a scope change in the CVSS vector.

Critical Impact
Unauthenticated attackers can execute arbitrary JavaScript in the browser of any user who interacts with a crafted link or page, enabling account takeover and content manipulation on WordPress sites running the plugin.

Affected Products

Razorpay Payment Button WordPress plugin versions <= 2.4.9
WordPress sites with the vulnerable plugin installed and activated
Any front-end user session interacting with attacker-supplied input handled by the plugin

Discovery Timeline

2026-09-23 - CVE-2026-94179 published to NVD
2026-09-23 - Last updated in NVD database

Technical Details for CVE-2026-94179

Vulnerability Analysis

The Razorpay Payment Button plugin fails to properly sanitize or encode user-supplied input before reflecting it into rendered HTML output. Because the vulnerability is reachable without authentication, an attacker only needs to craft a URL or request that a victim visits or interacts with. The scope-change component of the vulnerability indicates the injected script can affect resources beyond the plugin's own security boundary, such as the broader WordPress session context. Impact spans confidentiality, integrity, and availability at a limited level, consistent with a reflected or stored XSS pattern in a plugin surface.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. Input received by plugin endpoints or shortcodes is emitted into the DOM without adequate output encoding or contextual escaping. WordPress provides sanitization primitives such as esc_html(), esc_attr(), and wp_kses(), but the affected code paths in versions up to 2.4.9 do not consistently apply them before rendering user-controlled values.

Attack Vector

The attack requires network access and user interaction. An attacker crafts a URL or form submission containing a JavaScript payload targeting a vulnerable plugin parameter. When a visitor or administrator loads the resulting page, the browser executes the payload under the origin of the WordPress site. This enables cookie theft, forced administrative actions via CSRF chaining, and injection of malicious content into the checkout flow. See the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2026-94179

Indicators of Compromise

Web server access logs containing request parameters with <script>, javascript:, onerror=, or encoded variants such as %3Cscript%3E targeting Razorpay plugin endpoints.
Unexpected outbound requests from browsers of site visitors to attacker-controlled domains following visits to pages that render the plugin.
Newly created WordPress administrator accounts or altered plugin settings shortly after suspicious request activity.

Detection Strategies

Inspect HTTP request and response bodies for reflected payloads originating from plugin-related URLs and query strings.
Correlate WordPress audit logs with web access logs to identify sessions that rendered untrusted input.
Deploy a Web Application Firewall (WAF) rule set that flags common XSS patterns targeting plugin parameters and shortcode handlers.

Monitoring Recommendations

Enable Content Security Policy (CSP) reporting to capture blocked inline script executions on WordPress pages.
Monitor administrator session activity for anomalous cookie use, IP changes, or privilege escalations.
Track plugin file integrity and configuration changes on WordPress installations that host payment functionality.

How to Mitigate CVE-2026-94179

Immediate Actions Required

Update the Razorpay Payment Button plugin to a version later than 2.4.9 once the vendor publishes a fixed release.
Audit WordPress user accounts and revoke sessions for administrators who may have visited untrusted links.
Restrict plugin availability to trusted origins and enforce least-privilege for WordPress editor and administrator roles.

Patch Information

Refer to the Patchstack Vulnerability Report for vendor patch status and remediation guidance. Site operators should subscribe to WordPress plugin update notifications and apply the fixed version as soon as it becomes available.

Workarounds

Deactivate and remove the Razorpay Payment Button plugin until a patched version is installed.
Deploy a WAF rule that blocks requests containing script tags or JavaScript event handlers directed at plugin endpoints.
Enforce a strict Content Security Policy that disallows inline scripts and untrusted external script sources on WordPress pages.

bash

# Configuration example: strict CSP header for WordPress (nginx)
add_header Content-Security-Policy "default-src 'self'; script-src 'self' https://checkout.razorpay.com; object-src 'none'; base-uri 'self'; frame-ancestors 'self'" always;