CVE-2025-48320: Baidushare-WP CSRF Vulnerability

CVE-2025-48320 Overview

CVE-2025-48320 is a Cross-Site Request Forgery (CSRF) vulnerability in the cuckoohello 百度分享按钮 (baidushare-wp) WordPress plugin that enables Stored Cross-Site Scripting (XSS) attacks. This chained vulnerability allows attackers to trick authenticated administrators into unknowingly submitting malicious requests that inject persistent JavaScript code into the WordPress site.

Critical Impact

Attackers can leverage CSRF to inject malicious scripts that persist in the WordPress database, affecting all site visitors and potentially leading to session hijacking, credential theft, or complete site compromise.

Affected Products

• baidushare-wp WordPress Plugin version 1.0.6 and earlier
• WordPress sites with baidushare-wp plugin installed
• All users visiting affected WordPress pages after exploitation

Discovery Timeline

• 2025-08-28 - CVE-2025-48320 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-48320

Vulnerability Analysis

This vulnerability represents a dangerous combination of two web application security flaws. The baidushare-wp plugin fails to implement proper CSRF protection mechanisms on its administrative functions, allowing attackers to craft malicious requests that bypass same-origin protections. When combined with the lack of output encoding, this enables attackers to inject persistent malicious JavaScript that executes in the browsers of all subsequent visitors.

The attack requires user interaction—an authenticated WordPress administrator must be tricked into visiting a malicious page or clicking a crafted link while logged into the WordPress admin panel. Once successful, the injected XSS payload persists in the WordPress database, creating a persistent threat that affects all users who view pages containing the plugin's output.

Root Cause

The root cause of this vulnerability is the absence of nonce verification in the plugin's form submission handlers combined with inadequate sanitization of user-supplied input before storage in the database. WordPress provides built-in functions like wp_nonce_field() and wp_verify_nonce() for CSRF protection, and functions like esc_html() and wp_kses() for output sanitization, but these mechanisms were not properly implemented in the affected plugin versions.

Attack Vector

The attack leverages a network-based vector requiring user interaction. An attacker constructs a malicious HTML page containing an auto-submitting form that targets the vulnerable plugin endpoint. When an authenticated WordPress administrator visits this page, their browser automatically submits the form request—including their valid session cookies—to the WordPress site. Because the plugin does not validate the request origin using CSRF tokens, it accepts and processes the malicious payload, storing attacker-controlled JavaScript in the database.

The vulnerability mechanism involves crafted HTTP POST requests to the plugin's settings page without proper nonce verification. Technical details and proof-of-concept information can be found in the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-48320

Indicators of Compromise

• Unexpected or unauthorized JavaScript code in plugin settings or database entries related to baidushare-wp
• Suspicious administrator activity patterns, particularly settings changes without corresponding legitimate admin actions
• Browser-based alerts or anomalous script execution when viewing pages with the Baidu share functionality
• Unusual outbound connections from visitor browsers to unknown external domains

Detection Strategies

• Monitor WordPress admin action logs for changes to baidushare-wp plugin settings, especially from unusual IP addresses or at unusual times
• Implement Web Application Firewall (WAF) rules to detect and block CSRF attack patterns targeting WordPress plugin endpoints
• Perform regular database audits to identify unauthorized or malicious content in plugin-related tables
• Deploy Content Security Policy (CSP) headers to detect and report unauthorized script execution attempts

Monitoring Recommendations

• Enable WordPress security audit logging plugins to capture all administrative actions with full context
• Configure SentinelOne Singularity to monitor for suspicious web application behavior and script injection patterns
• Implement real-time alerting for modifications to WordPress options tables containing plugin configurations
• Establish baseline behavior for administrator sessions and alert on deviations that may indicate CSRF exploitation

How to Mitigate CVE-2025-48320

Immediate Actions Required

• Deactivate and remove the baidushare-wp plugin immediately if not essential for site functionality
• Audit the WordPress database for any injected malicious content in plugin-related settings
• Review administrator account activity logs for any suspicious or unauthorized changes
• Force password resets for all WordPress administrator accounts as a precautionary measure

Patch Information

No official patch has been confirmed as available at this time. The vulnerability affects baidushare-wp versions from n/a through 1.0.6. Organizations should consult the Patchstack Vulnerability Report for the latest remediation guidance and monitor for vendor updates.

Workarounds

• Remove the baidushare-wp plugin entirely until a patched version becomes available
• Implement a Web Application Firewall (WAF) with rules to block CSRF attempts targeting WordPress admin endpoints
• Restrict WordPress admin panel access to trusted IP addresses using server-level access controls
• Deploy Content Security Policy headers to mitigate the impact of any successful XSS injection

# Example .htaccess rule to restrict admin access by IP
<Files wp-login.php>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>

# Block access to wp-admin directory
<Directory /var/www/html/wp-admin>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Directory>