CVE-2025-64227 CRITICAL

CVE-2025-64227: WordPress Client Invoicing by Sprout Invoices plugin <= 20.8.7 - PHP Object Injection vulnerability

Vendor Boldgrid
Product Client Invoicing by Sprout Invoices
Weakness CWE-502 · Unsafe deserialization
Published December 18, 2025
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in BoldGrid Client Invoicing by Sprout Invoices sprout-invoices allows Object Injection.This issue affects Client Invoicing by Sprout Invoices: from n/a through <= 20.8.7.

Explanation of Vulnerability in Simple Terms

02Summary

Sprout Invoices versions up to 20.8.7 contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on the site without user interaction. The vulnerability stems from unsafe handling of serialized data, enabling remote code execution. Site administrators should update immediately to a patched version.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site and take full control of it.

Potential impact on your site

04Site Impact

Complete compromise of the site, including data theft, malware installation, and site defacement.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

December 18, 2025 CVE published
April 28, 2026 Record updated