CVE-2025-31829: ShopCred DOM-Based XSS Vulnerability

CVE-2025-31829 Overview

CVE-2025-31829 is a DOM-Based Cross-Site Scripting (XSS) vulnerability affecting the devscred ShopCred WordPress plugin. The flaw stems from improper neutralization of input during web page generation [CWE-79]. All versions of ShopCred up to and including 1.3.0 are affected. An authenticated attacker with low privileges can inject malicious script that executes in a victim's browser after user interaction. Successful exploitation results in a scope change, allowing the attacker to affect resources beyond the vulnerable component.

Critical Impact
Attackers can execute arbitrary JavaScript in victim browsers, enabling session hijacking, credential theft, and unauthorized actions within the WordPress site context.

Affected Products

devscred ShopCred WordPress plugin versions up to and including 1.3.0
WordPress sites running the vulnerable ShopCred plugin
Users interacting with attacker-controlled DOM inputs in affected pages

Discovery Timeline

2025-04-01 - CVE CVE-2025-31829 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31829

Vulnerability Analysis

The vulnerability is a DOM-Based XSS flaw classified under [CWE-79]. Unlike reflected or stored XSS, DOM-Based XSS occurs entirely on the client side. The ShopCred plugin processes untrusted input through client-side JavaScript and writes it into the Document Object Model without proper sanitization or encoding. When a victim loads a crafted URL or interacts with attacker-influenced content, the payload executes in the browser under the origin of the WordPress site.

Exploitation requires an authenticated user with low privileges and user interaction, such as clicking a crafted link. The scope change indicates the vulnerable component impacts resources beyond its own security boundary, typically the broader WordPress session context.

Root Cause

The root cause is missing or inadequate output encoding when the plugin's client-side scripts render user-controlled data into DOM sinks. Common sink patterns include assignments to innerHTML, document.write, or unsafe use of jQuery methods such as .html(). Because sanitization occurs client-side, server-side WordPress filters do not intercept the payload.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker crafts a URL or input containing a JavaScript payload that reaches a vulnerable DOM sink within a ShopCred plugin page. When a low-privileged authenticated user visits the URL, the script executes with the privileges of the current WordPress session. The attacker can hijack sessions, exfiltrate authentication cookies, perform actions on behalf of the user, or pivot to other administrative functions. See the Patchstack XSS Vulnerability Report for technical details.

Detection Methods for CVE-2025-31829

Indicators of Compromise

Unexpected <script> tags, javascript: URIs, or event-handler attributes in ShopCred plugin request parameters or fragment identifiers
WordPress access logs showing requests containing encoded payloads such as %3Cscript%3E, onerror=, or onload= targeting ShopCred endpoints
Anomalous outbound requests from user browsers to unfamiliar domains following visits to ShopCred pages
Creation of new administrative WordPress accounts or unexpected privilege changes shortly after user interaction with plugin URLs

Detection Strategies

Inspect HTTP request parameters and URL fragments processed by ShopCred pages for XSS payload patterns
Deploy a Web Application Firewall (WAF) with XSS rule sets covering DOM sink patterns
Enable and monitor Content Security Policy (CSP) violation reports for the WordPress site
Review browser telemetry for unexpected script execution originating from ShopCred plugin pages

Monitoring Recommendations

Audit WordPress plugin inventory to identify sites running ShopCred at version 1.3.0 or earlier
Correlate authenticated session activity with suspicious client-side script execution events
Monitor for privilege escalation, unauthorized post modifications, or configuration changes following user visits to plugin URLs

How to Mitigate CVE-2025-31829

Immediate Actions Required

Identify all WordPress installations running ShopCred version 1.3.0 or earlier
Update the ShopCred plugin to a patched version once released by the vendor
Deactivate and remove the ShopCred plugin from production sites if no patch is available
Rotate WordPress administrator and user credentials if exploitation is suspected

Patch Information

No confirmed patched version is listed in the enriched data at the time of publication. Administrators should consult the Patchstack XSS Vulnerability Report and the devscred vendor channels for updated patch availability.

Workarounds

Restrict access to ShopCred plugin pages through role-based permissions or IP allowlisting
Deploy a WAF with rules that block common XSS payload patterns targeting WordPress plugins
Implement a strict Content Security Policy that disallows inline scripts and untrusted script sources
Educate authenticated users to avoid clicking untrusted links referencing the WordPress site

bash

# Example: Deactivate ShopCred plugin via WP-CLI
wp plugin deactivate shopcred
wp plugin delete shopcred