CVE-2025-64229 Overview
CVE-2025-64229 is a Missing Authorization vulnerability [CWE-862] in the BoldGrid Client Invoicing by Sprout Invoices plugin for WordPress. The flaw affects all versions up to and including 20.8.7. Authenticated attackers with low-level privileges can exploit incorrectly configured access control on plugin endpoints. Successful exploitation impacts data integrity but does not require user interaction. The vulnerability is exploitable over the network against WordPress sites that run the affected plugin.
Critical Impact
Authenticated users with minimal privileges can invoke restricted plugin functionality, modifying invoicing data outside their authorization scope.
Affected Products
- BoldGrid Client Invoicing by Sprout Invoices plugin for WordPress
- Plugin slug: sprout-invoices
- Versions from n/a through 20.8.7
Discovery Timeline
- 2025-10-29 - CVE-2025-64229 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-64229
Vulnerability Analysis
The Sprout Invoices plugin exposes plugin actions that lack proper authorization checks. WordPress plugins typically enforce access control through current_user_can() capability checks or nonce verification tied to a specific capability. When these checks are missing or incorrectly configured, low-privileged authenticated users can call functionality reserved for administrators or invoice owners.
The issue is scoped to integrity impact. Attackers can alter invoicing-related state but cannot directly disclose confidential data or cause service disruption through this flaw alone. Exploitation requires network access to the WordPress site and any authenticated session, including subscriber-level accounts on sites that permit registration.
Review the Patchstack Vulnerability Report for endpoint-level details.
Root Cause
The root cause is missing or insufficient authorization on one or more plugin request handlers. The plugin does not consistently validate that the requesting user holds the capability required for the requested action. This maps directly to CWE-862: Missing Authorization.
Attack Vector
An attacker authenticates to the target WordPress site with any account. The attacker then submits a crafted request to a plugin endpoint that should be restricted. Because the endpoint omits the required capability check, the plugin processes the request and mutates invoicing state. No user interaction from a privileged user is needed.
No verified public proof-of-concept code is available. See the referenced Patchstack advisory for a description of the affected endpoints.
Detection Methods for CVE-2025-64229
Indicators of Compromise
- Unexpected creation, modification, or deletion of invoices, estimates, or client records within the Sprout Invoices data tables.
- Authenticated admin-ajax.php or REST requests to sprout-invoices actions originating from low-privileged accounts such as subscribers.
- New or altered WordPress user accounts followed by activity against sprout_* database tables.
Detection Strategies
- Enable WordPress audit logging and alert on plugin action calls made by non-administrator roles.
- Correlate HTTP access logs with WordPress user session data to identify low-privilege users invoking privileged plugin endpoints.
- Baseline normal invoice workflow activity, then flag deviations such as bulk edits from unusual accounts.
Monitoring Recommendations
- Monitor requests to wp-admin/admin-ajax.php and REST routes that reference sprout-invoices or si_ action names.
- Track privilege distribution of accounts issuing plugin actions and alert when subscriber or customer roles trigger administrative operations.
- Watch for spikes in 200-response POST requests to plugin endpoints from newly registered accounts.
How to Mitigate CVE-2025-64229
Immediate Actions Required
- Upgrade the Client Invoicing by Sprout Invoices plugin to the fixed release published after version 20.8.7 as noted in the Patchstack advisory.
- Audit WordPress user accounts and remove or downgrade any unnecessary registrations, especially self-registered subscribers.
- Review recent invoice and client record changes for unauthorized modifications and restore from backup where required.
Patch Information
Refer to the Patchstack Vulnerability Report for the current fixed version and vendor patch details. Apply the update through the WordPress plugin manager or via WP-CLI once the vendor release is available.
Workarounds
- Disable open user registration on the WordPress site until the plugin is updated.
- Restrict access to wp-admin/admin-ajax.php and plugin REST routes at the web application firewall to trusted IP ranges where feasible.
- Deactivate the Sprout Invoices plugin if invoicing functionality is not currently in use.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
