CVE-2025-49393 CRITICAL

CVE-2025-49393: WordPress Sign-up Sheets Plugin <= 2.3.2 - PHP Object Injection Vulnerability

Vendor Fetch Designs
Product Sign-up Sheets
Weakness CWE-502 · Unsafe deserialization
Published November 6, 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 Fetch Designs Sign-up Sheets sign-up-sheets allows Object Injection.This issue affects Sign-up Sheets: from n/a through <= 2.3.2.

Explanation of Vulnerability in Simple Terms

02Summary

Sign-up Sheets versions 2.3.2 and earlier contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on the site. The vulnerability exists because the product deserializes untrusted data without proper validation. An attacker can exploit this remotely over the network without requiring user interaction or authentication.

What an attacker can do

03Attacker Capabilities

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

Potential impact on your site

04Site Impact

Complete site compromise: attackers can steal data, modify content, install malware, or take the site offline.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

November 6, 2025 CVE published
April 28, 2026 Record updated