CVE-2025-2568 Overview
CVE-2025-2568 affects the Vayu Blocks – Gutenberg Blocks for WordPress & WooCommerce plugin in versions 1.0.4 through 1.2.1. The plugin exposes two AJAX callbacks, vayu_blocks_get_toggle_switch_values_callback and vayu_blocks_save_toggle_switch_callback, without capability checks. Unauthenticated attackers can read arbitrary plugin options and update any WordPress option whose key ends in _value. The flaw is classified as Missing Authorization [CWE-862] and originates in inc/function.php.
Critical Impact
Unauthenticated network-based access allows attackers to read plugin options and tamper with option values on affected WordPress sites, undermining site integrity.
Affected Products
- Vayu Blocks – Gutenberg Blocks for WordPress & WooCommerce plugin version 1.0.4
- Vayu Blocks plugin versions 1.0.5 through 1.2.0
- Vayu Blocks plugin version 1.2.1
Discovery Timeline
- 2025-04-08 - CVE-2025-2568 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-2568
Vulnerability Analysis
The Vayu Blocks plugin registers two AJAX handlers that manage toggle switch settings. Both handlers execute privileged option read and write operations but omit current_user_can() or nonce verification. Because WordPress permits unauthenticated access to admin-ajax.php actions registered with wp_ajax_nopriv_, any remote user can invoke these callbacks.
The vayu_blocks_get_toggle_switch_values_callback function returns stored option values to the caller. The vayu_blocks_save_toggle_switch_callback function accepts an option key and value from the request and writes it via update_option(). The write path constrains keys to those ending in _value, but this filter still exposes numerous plugin and site options to unauthenticated modification.
Attackers can leverage this to alter feature flags, disclose configuration, or overwrite third-party plugin options that follow the _value naming pattern. The vulnerability affects data integrity but does not directly grant code execution or administrative takeover.
Root Cause
The root cause is missing authorization on privileged AJAX endpoints. The developer registered the handlers for both authenticated and unauthenticated users without validating the caller's capability or verifying a nonce. Source references in the plugin's inc/function.php at lines 126, 133, 139, and 182 show the callback definitions and option access logic without permission checks.
Attack Vector
The attack is remote and unauthenticated. An attacker sends a crafted POST request to wp-admin/admin-ajax.php with the vulnerable action parameter and a target option key ending in _value. No user interaction, credentials, or session is required. See the Wordfence Vulnerability Analysis and the WordPress Changeset Summary for technical details.
Detection Methods for CVE-2025-2568
Indicators of Compromise
- Unauthenticated POST requests to wp-admin/admin-ajax.php containing action=vayu_blocks_get_toggle_switch_values_callback or action=vayu_blocks_save_toggle_switch_callback
- Unexpected changes to WordPress options with keys ending in _value in the wp_options table
- Repeated AJAX invocations from a single IP without an associated authenticated session
Detection Strategies
- Inspect web server access logs for the two AJAX action names and correlate with unauthenticated sessions
- Compare current wp_options values against known-good backups to identify tampered entries
- Deploy a Web Application Firewall (WAF) rule that blocks unauthenticated calls to the vulnerable actions
Monitoring Recommendations
- Alert on modifications to options matching the %_value pattern in the wp_options table
- Monitor for anomalous volumes of admin-ajax.php requests from single sources
- Track installed plugin versions across WordPress sites and flag any host still running Vayu Blocks 1.0.4 through 1.2.1
How to Mitigate CVE-2025-2568
Immediate Actions Required
- Update the Vayu Blocks plugin to a version later than 1.2.1 that includes the fix from changeset 3263702
- Audit the wp_options table for unauthorized changes to keys ending in _value
- If patching is not immediately possible, deactivate and remove the Vayu Blocks plugin
Patch Information
The vendor addressed the missing authorization checks in the plugin update tracked by WordPress changeset 3263702. The patch adds capability and nonce verification to both AJAX callbacks. Site administrators should upgrade through the WordPress plugin dashboard or via WP-CLI.
Workarounds
- Block unauthenticated requests to admin-ajax.php where the action parameter matches the two vulnerable callback names using a WAF rule
- Restrict access to wp-admin/admin-ajax.php at the reverse proxy layer for known-bad action names until the plugin is updated
- Temporarily disable the Vayu Blocks plugin until a patched version is deployed
# Update the Vayu Blocks plugin using WP-CLI
wp plugin update vayu-blocks
# Verify the installed version is greater than 1.2.1
wp plugin get vayu-blocks --field=version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
