CVE-2026-24565: B Accordion Information Disclosure Flaw

CVE-2026-24565 Overview

CVE-2026-24565 is a Sensitive Data Exposure vulnerability affecting the B Accordion WordPress plugin developed by bPlugins. The vulnerability is classified as CWE-201 (Insertion of Sensitive Information Into Sent Data), which allows attackers with low-level privileges to retrieve embedded sensitive data from the affected WordPress installations.

This vulnerability exists due to improper handling of sensitive information within the plugin's data transmission mechanisms. When exploited, authenticated attackers can access confidential data that should not be exposed through the plugin's functionality.

Critical Impact

Authenticated attackers with minimal privileges can extract sensitive embedded data from WordPress sites running vulnerable versions of B Accordion plugin, potentially compromising confidential information.

Affected Products

• B Accordion WordPress Plugin version 2.0.0 and earlier
• WordPress installations with B Accordion plugin (b-accordion) installed
• All prior versions from initial release through version 2.0.0

Discovery Timeline

• 2026-01-23 - CVE-2026-24565 published to NVD
• 2026-01-27 - Last updated in NVD database

Technical Details for CVE-2026-24565

Vulnerability Analysis

This vulnerability falls under the category of Information Disclosure, specifically Sensitive Data Exposure. The B Accordion plugin fails to properly sanitize or restrict sensitive information before including it in data sent to authenticated users. This architectural flaw means that data which should remain confidential on the server-side is inadvertently transmitted to users who should not have access to it.

The attack requires network access and authentication with low privileges (such as a subscriber or contributor role in WordPress). No user interaction is required for exploitation, making this vulnerability particularly concerning for multi-user WordPress environments where not all authenticated users should have access to all data.

Root Cause

The root cause of CVE-2026-24565 is the Insertion of Sensitive Information Into Sent Data (CWE-201). The B Accordion plugin includes sensitive data in its responses without proper access control validation or data filtering. This typically occurs when plugin developers inadvertently include database fields, configuration values, or other sensitive information in AJAX responses, REST API endpoints, or rendered output that authenticated users can access.

Attack Vector

The attack is conducted over the network by authenticated users with low-level privileges. The attacker authenticates to the WordPress installation with any valid user account, then interacts with the B Accordion plugin functionality to trigger responses containing embedded sensitive data. Since no special configurations or user interactions are required beyond basic authentication, the attack complexity is low.

The vulnerability allows for high confidentiality impact, meaning attackers can gain access to all sensitive data exposed through this flaw. However, integrity and availability are not affected, as the vulnerability does not allow modification of data or disruption of service.

For technical details on this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-24565

Indicators of Compromise

• Unusual access patterns to B Accordion plugin endpoints by low-privilege users
• Elevated volume of requests to plugin AJAX handlers or REST endpoints from authenticated sessions
• Log entries showing access to B Accordion functionality from accounts that typically don't use accordion features
• Unexpected data extraction patterns or export activities correlating with B Accordion plugin usage

Detection Strategies

• Monitor WordPress AJAX and REST API logs for unusual patterns of requests to b-accordion related endpoints
• Implement web application firewall (WAF) rules to detect and alert on suspicious data retrieval patterns
• Review authentication logs for accounts accessing B Accordion features outside normal usage patterns
• Deploy endpoint detection to identify bulk data access or exfiltration attempts through plugin interfaces

Monitoring Recommendations

• Enable detailed logging for WordPress plugin activity, particularly for the B Accordion plugin
• Configure SIEM alerts for anomalous authenticated user behavior targeting accordion functionality
• Implement rate limiting on plugin endpoints to detect and prevent mass data extraction attempts
• Regularly audit user access patterns to identify potential reconnaissance or exploitation activities

How to Mitigate CVE-2026-24565

Immediate Actions Required

• Audit your WordPress installations to identify all instances of the B Accordion plugin
• Review plugin version to determine if running version 2.0.0 or earlier
• Consider temporarily deactivating the B Accordion plugin if not critical to operations until a patch is available
• Restrict user account creation and review existing low-privilege accounts for suspicious activity
• Monitor for any signs of exploitation or unauthorized data access

Patch Information

Check the Patchstack Vulnerability Report for the latest patch information and remediation guidance from the plugin vendor. WordPress administrators should update to a patched version as soon as one becomes available from bPlugins.

Workarounds

• Deactivate the B Accordion plugin until a security patch is released if accordion functionality is not essential
• Implement strict user role policies to minimize the number of accounts with even low-level authentication
• Deploy a Web Application Firewall (WAF) with rules to inspect and filter responses from the plugin
• Consider using alternative accordion plugins that are not affected by this vulnerability
• Implement additional access controls at the server level to restrict plugin endpoint access

# WordPress CLI command to check B Accordion plugin version
wp plugin list --name=b-accordion --fields=name,version,status

# Deactivate B Accordion plugin as temporary workaround
wp plugin deactivate b-accordion

# List all users with subscriber or higher role for audit
wp user list --role=subscriber,contributor,author,editor --fields=ID,user_login,user_email,roles