CVE-2025-58846: WordPress Buffer CSRF Vulnerability

CVE-2025-58846 Overview

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the WordPress Buffer – HYPESocial plugin, developed by Dejan Markovic. This plugin, which provides Social Media Auto Post, Social Media Auto Publish, and Schedule buffer functionality, is vulnerable to CSRF attacks that can lead to Reflected Cross-Site Scripting (XSS). The vulnerability allows attackers to trick authenticated users into executing unintended actions, potentially compromising the integrity and confidentiality of the affected WordPress installations.

Critical Impact

Attackers can exploit this CSRF vulnerability to execute arbitrary JavaScript in the context of an authenticated user's browser session, potentially leading to session hijacking, data theft, or unauthorized actions on the WordPress site.

Affected Products

• WordPress Buffer – HYPESocial plugin (buffer-my-post) versions through <= 2020.1.0
• WordPress installations running the vulnerable plugin version
• Sites utilizing the Social Media Auto Post and Auto Publish features

Discovery Timeline

• 2025-09-05 - CVE-2025-58846 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-58846

Vulnerability Analysis

This vulnerability represents a chained attack combining Cross-Site Request Forgery (CSRF) with Reflected Cross-Site Scripting (XSS). The WordPress Buffer – HYPESocial plugin fails to implement proper CSRF token validation on certain administrative endpoints, allowing attackers to craft malicious requests that execute in the context of an authenticated administrator's session.

The CSRF vulnerability enables attackers to bypass same-origin policy protections by tricking authenticated users into visiting a malicious page or clicking a crafted link. When combined with the Reflected XSS component, this creates a potent attack chain where user-supplied input is reflected back without proper sanitization, allowing arbitrary JavaScript execution.

The vulnerability affects the plugin's request handling mechanism, particularly in areas related to social media scheduling and auto-publishing configuration. An attacker can leverage this to modify plugin settings, inject malicious scripts, or perform other administrative actions without proper authorization.

Root Cause

The root cause of this vulnerability is the absence of proper CSRF token validation (nonce verification) in the WordPress Buffer – HYPESocial plugin. WordPress provides built-in nonce functions (wp_nonce_field(), wp_verify_nonce(), check_admin_referer()) that should be used to validate the origin of form submissions and AJAX requests. The failure to implement these protections, combined with insufficient output sanitization, allows both the CSRF attack and subsequent Reflected XSS exploitation.

This falls under CWE-352 (Cross-Site Request Forgery), which describes vulnerabilities where web applications do not sufficiently verify that requests were intentionally submitted by the authenticated user.

Attack Vector

The attack is network-based and requires user interaction. An attacker must craft a malicious webpage or link containing a forged request targeting the vulnerable plugin endpoints. When an authenticated WordPress administrator visits the attacker-controlled page or clicks the malicious link, their browser automatically sends the forged request along with their valid session cookies.

The attack flow typically involves:

1. Attacker identifies vulnerable endpoints in the buffer-my-post plugin
2. Attacker crafts a malicious HTML page containing auto-submitting forms or JavaScript that targets these endpoints
3. Attacker delivers the malicious page to the victim (via phishing, malicious ads, or compromised websites)
4. Victim visits the malicious page while authenticated to their WordPress admin panel
5. The forged request executes with the victim's privileges, potentially injecting malicious scripts or modifying plugin configuration

For detailed technical information, see the Patchstack WordPress Vulnerability Database.

Detection Methods for CVE-2025-58846

Indicators of Compromise

• Unexpected changes to WordPress Buffer – HYPESocial plugin settings or configurations
• Suspicious social media posts that were not authorized by administrators
• Unusual referrer headers in web server logs pointing to external malicious domains
• JavaScript execution alerts or unexpected browser behavior in the WordPress admin panel
• Unauthorized modifications to scheduled posts or auto-publish settings

Detection Strategies

• Review web server access logs for unusual POST requests to plugin-related endpoints from external referrers
• Monitor for changes to plugin configuration files or database entries related to buffer-my-post
• Implement Content Security Policy (CSP) headers to detect and prevent unauthorized script execution
• Deploy Web Application Firewall (WAF) rules to detect CSRF attack patterns targeting WordPress plugins

Monitoring Recommendations

• Enable detailed logging for WordPress admin actions and plugin configuration changes
• Implement real-time alerting for modifications to plugin settings outside of normal administrative workflows
• Monitor for outbound connections or data exfiltration attempts following plugin configuration changes
• Regularly audit installed plugin versions against known vulnerability databases

How to Mitigate CVE-2025-58846

Immediate Actions Required

• Deactivate and remove the WordPress Buffer – HYPESocial plugin (buffer-my-post) if running version 2020.1.0 or earlier
• Audit WordPress admin user activity logs for any unauthorized actions or configuration changes
• Review and reset social media API credentials and tokens configured in the plugin
• Check for any unauthorized scheduled posts or modified auto-publish settings
• Consider implementing a Web Application Firewall (WAF) with CSRF protection rules

Patch Information

As of the published CVE data, all versions through 2020.1.0 of the WordPress Buffer – HYPESocial plugin are affected. Users should check for plugin updates via the WordPress Plugin Directory or contact the plugin developer for a patched version. If no patch is available, removing the vulnerable plugin is strongly recommended.

For additional vulnerability details and patch status, refer to the Patchstack security advisory.

Workarounds

• Disable the WordPress Buffer – HYPESocial plugin until a patched version is available
• Restrict access to the WordPress admin panel to trusted IP addresses only
• Implement additional authentication layers (2FA) for administrative accounts
• Use browser-based CSRF protection extensions as a temporary measure
• Consider alternative social media scheduling plugins that have active security maintenance

# Configuration example - Disable the vulnerable plugin via WP-CLI
wp plugin deactivate buffer-my-post

# Verify the plugin is deactivated
wp plugin list --status=inactive | grep buffer-my-post

# Optional: Remove the plugin entirely
wp plugin delete buffer-my-post