CVE-2025-64229 identifies a missing authorization vulnerability in the BoldGrid Client Invoicing plugin developed by Sprout Invoices, affecting versions up to and including 20.8.7. The vulnerability stems from incorrectly configured access control security levels, which allow users with limited privileges (PR:L) to perform unauthorized actions within the invoicing system. Specifically, the plugin fails to properly enforce authorization checks on certain invoicing functions, potentially enabling privilege escalation within the application context. The vulnerability does not require user interaction (UI:N) and can be exploited remotely (AV:N), making it accessible over the network by authenticated users with some level of access. The impact is limited to integrity (I:L), meaning attackers could modify or manipulate invoice data without authorization, but confidentiality and availability remain unaffected. No known exploits have been reported in the wild, and no patches are currently linked, indicating the need for vendor response. The vulnerability is classified as medium severity with a CVSS v3.1 score of 4.3, reflecting moderate risk due to the requirement of some privileges and limited impact scope. This flaw is particularly relevant for organizations relying on WordPress-based invoicing solutions using this plugin, as it could lead to financial discrepancies or fraudulent invoicing if exploited.

For European organizations, the missing authorization vulnerability in BoldGrid Client Invoicing could lead to unauthorized modification of invoicing data, potentially resulting in financial inaccuracies, fraud, or compliance issues. Organizations in sectors with strict financial regulations (e.g., finance, retail, and services) may face reputational damage or regulatory penalties if invoice integrity is compromised. Since the vulnerability requires some level of authenticated access, insider threats or compromised user accounts could be leveraged to exploit this flaw. The impact on confidentiality and availability is minimal, but the integrity compromise could disrupt billing processes and trustworthiness of financial records. Given the widespread use of WordPress and related invoicing plugins in Europe, especially among SMEs and e-commerce businesses, the risk is non-negligible. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once patches are released or if the vulnerability is disclosed publicly without mitigation.

1. Monitor the vendor’s official channels for patches addressing CVE-2025-64229 and apply them promptly once available. 2. In the interim, audit and tighten user role permissions within WordPress and the BoldGrid Client Invoicing plugin to ensure minimal necessary access is granted. 3. Implement additional access control mechanisms such as Web Application Firewalls (WAFs) to detect and block unauthorized invoicing actions. 4. Conduct regular reviews of invoicing records to detect anomalies or unauthorized changes. 5. Employ multi-factor authentication (MFA) for all users with access to invoicing functions to reduce risk of account compromise. 6. Restrict plugin access to trusted IP ranges or VPNs where feasible. 7. Educate staff on the risks of privilege misuse and enforce strict account management policies. 8. Consider isolating invoicing functions on separate systems or containers to limit potential lateral movement.