CVE-2026-25311: Autoshare for Twitter Auth Bypass Flaw

CVE-2026-25311 Overview

CVE-2026-25311 is a Missing Authorization vulnerability (CWE-862) affecting the 10up Autoshare for Twitter WordPress plugin. This broken access control vulnerability allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized actions within affected WordPress installations.

Critical Impact

Attackers with low privileges can bypass authorization controls to perform unauthorized modifications or cause service disruption on WordPress sites using the vulnerable plugin.

Affected Products

• 10up Autoshare for Twitter plugin version 2.3.1 and earlier
• WordPress installations with the autoshare-for-twitter plugin enabled

Discovery Timeline

• 2026-02-19 - CVE CVE-2026-25311 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-25311

Vulnerability Analysis

This vulnerability stems from a Missing Authorization flaw in the Autoshare for Twitter WordPress plugin. The plugin fails to properly verify user permissions before processing certain requests, allowing authenticated users with low-level privileges to access functionality that should be restricted to administrators or higher-privileged users.

The vulnerability is network-accessible and requires low attack complexity, though it does require the attacker to have some level of authentication to the target WordPress site. While confidentiality is not directly impacted, the vulnerability allows for unauthorized integrity modifications and can cause limited availability disruption.

Root Cause

The root cause of this vulnerability is the absence of proper authorization checks (CWE-862) in the plugin's request handling logic. When processing plugin-related requests, the affected versions fail to verify that the authenticated user has the appropriate WordPress capability or role to perform the requested action. This broken access control allows users with minimal privileges to perform actions reserved for site administrators.

Attack Vector

The attack vector for CVE-2026-25311 is network-based, requiring an attacker to:

1. Obtain low-level authenticated access to a WordPress site running the vulnerable plugin
2. Craft requests targeting the plugin's functionality that lacks authorization checks
3. Execute unauthorized actions that bypass intended access control restrictions

This exploitation path leverages the incorrectly configured access control levels within the plugin, allowing privilege escalation through the WordPress interface.

For detailed technical analysis, see the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-25311

Indicators of Compromise

• Unusual plugin configuration changes made by non-administrator users
• Unexpected modifications to Twitter autoshare settings
• Access log entries showing plugin-related requests from low-privilege authenticated users
• Audit trail inconsistencies in WordPress activity logs

Detection Strategies

• Monitor WordPress admin activity logs for unauthorized plugin configuration changes
• Implement Web Application Firewall (WAF) rules to detect suspicious plugin-related requests
• Review user activity logs for privilege escalation patterns
• Deploy endpoint detection to identify unauthorized WordPress plugin interactions

Monitoring Recommendations

• Enable comprehensive WordPress audit logging for all plugin-related activities
• Configure alerts for plugin settings modifications by non-admin users
• Implement real-time monitoring of WordPress user session activities
• Regularly review access logs for anomalous patterns targeting the autoshare-for-twitter plugin

How to Mitigate CVE-2026-25311

Immediate Actions Required

• Update the Autoshare for Twitter plugin to a patched version when available
• Review and audit all plugin configuration changes made recently
• Restrict plugin access to only trusted administrator accounts
• Consider temporarily disabling the plugin until a patch is applied

Patch Information

Users are advised to monitor the official WordPress plugin repository and the vendor's security communications for an updated version that addresses this authorization bypass. The vulnerability affects versions through 2.3.1, so users should upgrade to a version higher than 2.3.1 once released.

For more information, refer to the Patchstack Vulnerability Report.

Workarounds

• Implement additional capability checks using WordPress hooks or security plugins
• Use a Web Application Firewall to restrict access to plugin endpoints
• Limit user account creation and enforce strict role management
• Consider disabling the plugin temporarily if not critical to operations

# WordPress workaround: Restrict plugin admin access via .htaccess
# Add to wp-content/plugins/autoshare-for-twitter/.htaccess

<Files *.php>
  Order Deny,Allow
  Deny from all
  Allow from 127.0.0.1
</Files>

# Note: This may affect plugin functionality - test thoroughly before production use