CVE-2025-23654: Twitter Post Plugin CSRF Vulnerability

CVE-2025-23654 Overview

A Cross-Site Request Forgery (CSRF) vulnerability exists in the WordPress Twitter Post plugin (twitterpost) developed by krolow. This vulnerability enables attackers to perform unauthorized actions on behalf of authenticated users, ultimately leading to Stored Cross-Site Scripting (XSS). By exploiting the CSRF weakness, an attacker can inject persistent malicious scripts into the WordPress site that execute when other users view the affected pages.

Critical Impact

This CSRF-to-Stored-XSS chain allows attackers to inject persistent malicious scripts that execute in the context of other users' sessions, potentially leading to session hijacking, data theft, or complete site compromise.

Affected Products

• WordPress Twitter Post plugin (twitterpost) version 0.1 and earlier
• All WordPress installations running the affected plugin versions

Discovery Timeline

• 2025-01-16 - CVE-2025-23654 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-23654

Vulnerability Analysis

This vulnerability represents a chained attack that combines two distinct web application weaknesses. The Twitter Post plugin fails to implement proper CSRF token validation on state-changing requests, allowing external websites to trick authenticated administrators into submitting malicious forms. The plugin also lacks adequate input sanitization and output encoding, enabling the injected payload to persist as Stored XSS within the WordPress database.

When an authenticated administrator visits a malicious page crafted by the attacker, their browser automatically submits a forged request to the vulnerable plugin endpoint. Because the plugin does not verify the request's origin through CSRF tokens, it processes the attacker-controlled data. The malicious JavaScript payload is then stored in the database and rendered without proper encoding whenever the affected content is displayed.

Root Cause

The root cause stems from two security failures in the Twitter Post plugin: missing CSRF protection on form submission handlers and inadequate input validation combined with improper output encoding. The plugin does not utilize WordPress nonce verification to validate that requests originate from legitimate user actions within the WordPress admin interface. Additionally, user-supplied input is stored directly in the database and rendered without sanitization, enabling script injection.

Attack Vector

The attack requires social engineering an authenticated WordPress administrator to visit a malicious website while logged into their WordPress dashboard. The attacker's page contains a hidden form that automatically submits to the vulnerable plugin endpoint. Due to the missing CSRF protection, the WordPress site accepts this cross-origin request and stores the attacker's payload. The stored XSS payload then executes whenever any user views the compromised content, allowing session theft, privilege escalation, or further attacks against site visitors.

The attack is classified as CWE-352 (Cross-Site Request Forgery), which chains directly into a Stored XSS condition. This combination significantly amplifies the impact, as the initial CSRF attack requires minimal user interaction while the resulting Stored XSS affects all subsequent visitors.

Detection Methods for CVE-2025-23654

Indicators of Compromise

• Unexpected or unauthorized modifications to Twitter Post plugin settings or stored content
• JavaScript tags or event handlers appearing in plugin data fields where plain text is expected
• Suspicious outbound requests from visitor browsers to unknown external domains
• Admin action logs showing plugin modifications without corresponding administrator activity

Detection Strategies

• Review WordPress database tables associated with the Twitter Post plugin for injected script content
• Monitor web application firewall (WAF) logs for requests containing XSS payloads targeting the plugin
• Implement Content Security Policy (CSP) headers to detect and block unauthorized script execution
• Audit access logs for unusual POST requests to plugin endpoints from external referrers

Monitoring Recommendations

• Enable detailed logging for WordPress plugin activity and administrative actions
• Deploy browser-based monitoring to detect unexpected JavaScript execution patterns
• Configure alerting for database modifications to plugin-related tables outside normal usage patterns
• Implement integrity monitoring on WordPress plugin files and database records

How to Mitigate CVE-2025-23654

Immediate Actions Required

• Deactivate and remove the Twitter Post (twitterpost) plugin from all WordPress installations immediately
• Review and clean any stored content associated with the plugin for injected malicious scripts
• Audit WordPress user sessions and consider forcing re-authentication for all administrators
• Scan the WordPress database for evidence of XSS payloads or unauthorized modifications

Patch Information

No vendor patch is currently available for this vulnerability. The affected plugin version 0.1 and all prior versions remain vulnerable. Site administrators should consider the plugin abandoned and seek alternative solutions for Twitter integration functionality. For additional technical details, refer to the Patchstack Vulnerability Report.

Workarounds

• Remove the vulnerable Twitter Post plugin entirely from WordPress installations
• Implement a Web Application Firewall (WAF) with rules to block CSRF and XSS attack patterns
• Deploy Content Security Policy headers to limit script execution to trusted sources
• Restrict administrative access to WordPress from trusted IP addresses only
• Use alternative, actively maintained plugins for Twitter/social media integration

# WordPress CLI commands to deactivate and remove the vulnerable plugin
wp plugin deactivate twitterpost
wp plugin delete twitterpost

# Verify plugin removal
wp plugin list --status=active | grep twitterpost