CVE-2025-31770: Content Manager Light Stored XSS Vulnerability

CVE-2025-31770 Overview

CVE-2025-31770 is a stored Cross-Site Scripting (XSS) vulnerability in the OTWthemes Content Manager Light plugin for WordPress. The flaw affects all versions of the content-manager-light plugin up to and including version 3.2. The plugin fails to properly neutralize user-supplied input during web page generation, allowing an authenticated attacker with low privileges to inject malicious scripts. These scripts execute in the browsers of other users who view the affected pages. The vulnerability is tracked under CWE-79: Improper Neutralization of Input During Web Page Generation.

Critical Impact
Attackers can inject persistent JavaScript that executes when administrators or site visitors load the compromised page, enabling session theft, redirection, and administrative account takeover.

Affected Products

OTWthemes Content Manager Light WordPress plugin (content-manager-light)
All versions from initial release through 3.2
WordPress sites with the plugin installed and activated

Discovery Timeline

2025-04-01 - CVE-2025-31770 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31770

Vulnerability Analysis

The vulnerability is a stored XSS flaw in the Content Manager Light plugin. Stored XSS occurs when user-supplied data is saved server-side and later rendered in HTML without adequate encoding or sanitization. An attacker with contributor-level or similar low-privilege access can submit input containing script payloads. When another user, typically an administrator, loads a page that renders this stored content, the browser executes the injected script in the context of the WordPress origin.

Successful exploitation requires user interaction, meaning a victim must load the affected page. The scope change indicates the injected script can affect resources beyond the vulnerable component, including the administrator's session. Attackers commonly leverage stored XSS to steal authentication cookies, perform actions on behalf of the victim, or pivot toward full site compromise.

Root Cause

The root cause is missing or insufficient output encoding when the plugin renders stored input into HTML contexts. WordPress plugins should apply esc_html(), esc_attr(), or wp_kses() when echoing user-controlled data. Content Manager Light through version 3.2 does not consistently apply these controls, permitting raw HTML and JavaScript tags to persist in the output.

Attack Vector

The attack vector is network-based through the WordPress web interface. An authenticated user with low privileges submits crafted content containing script tags or event-handler attributes through a plugin input field. The malicious payload is stored in the WordPress database. When a higher-privileged user views the affected content, the payload executes in their browser session. Refer to the Patchstack Vulnerability Analysis for additional technical context.

Detection Methods for CVE-2025-31770

Indicators of Compromise

Unexpected <script> tags, on* event handlers, or javascript: URIs stored in Content Manager Light database entries
Outbound requests from administrator browsers to unfamiliar domains after loading plugin-managed pages
Creation of new administrator accounts or modification of user roles shortly after a low-privileged user submits content
Anomalous session activity or cookie exfiltration attempts originating from WordPress admin sessions

Detection Strategies

Review WordPress database tables for stored HTML or JavaScript in fields managed by the content-manager-light plugin
Deploy a Web Application Firewall (WAF) with rules that identify XSS payload patterns in POST requests targeting plugin endpoints
Enable and monitor Content Security Policy (CSP) violation reports to identify blocked script executions
Audit user activity logs for content submissions from low-privileged accounts followed by administrator page views

Monitoring Recommendations

Monitor WordPress plugin directories for the presence of Content Manager Light versions at or below 3.2
Log and alert on administrative actions occurring immediately after page views by admin users
Track outbound HTTP requests from browsers loading WordPress admin pages to identify beaconing behavior
Establish baseline behavior for content submissions and alert on payloads containing HTML tags or JavaScript keywords

How to Mitigate CVE-2025-31770

Immediate Actions Required

Identify all WordPress sites running the Content Manager Light plugin and inventory their versions
Deactivate and remove the plugin if a patched release is not available for your version
Restrict content submission permissions to trusted users until remediation is complete
Review existing plugin-managed content for embedded scripts and purge any suspicious entries

Patch Information

At the time of the last NVD update, the advisory indicates the issue affects Content Manager Light through version 3.2 with no fixed version identified in the CVE record. Administrators should consult the Patchstack advisory and the plugin vendor for the latest patch status before redeploying.

Workarounds

Uninstall the Content Manager Light plugin until a fixed release is confirmed
Restrict access to plugin functionality using role-based permissions and limit account creation
Deploy a WAF ruleset that filters XSS payloads targeting WordPress plugin endpoints
Enforce a strict Content Security Policy to block inline scripts and unauthorized script sources

bash

# Configuration example: identify affected plugin installations
wp plugin list --path=/var/www/html --format=csv | grep content-manager-light

# Deactivate the plugin as a temporary mitigation
wp plugin deactivate content-manager-light --path=/var/www/html