CVE-2025-58998CWE-502insecure-deserialization

CVE-2025-58998

Critical · published November 6, 2025

CVSS v3.1
9.8
EPSS
1%
Percentile
42.1
In the wild
Unconfirmed
What it is

🚨 A sneaky object injection vulnerability in s2Member could turn your whole site upside down! 🔥 Think of it like a waiter who accepts orders without verifying what’s actually on the menu — if they don't check, anyone can substitute their dish for something completely different, potentially ruining the entire restaurant experience! An attacker can exploit this vulnerability to inject malicious objects into your application, leading to unauthorized actions like altering settings, accessing sensitive data, or even taking control of the entire site! The consequences could be absolutely devastating, putting your user data and your reputation on the line.

Put simply

Think of it like a waiter who accepts orders without verifying what’s actually on the menu — if they don't check, anyone can substitute their dish for something completely different, potentially ruining the entire restaurant experience! This vulnerability arises from the deserialization of untrusted data, allowing attackers to manipulate and execute arbitrary code through the injection of crafted objects into the application.

What to do

An attacker can exploit this vulnerability to inject malicious objects into your application, leading to unauthorized actions like altering settings, accessing sensitive data, or even taking control of the entire site! The consequences could be absolutely devastating, putting your user data and your reputation on the line. Immediate action is required! Upgrade your s2Member to the latest version and ensure that all user inputs are properly validated before being deserialized. Additionally, review your security practices surrounding data handling to prevent future vulnerabilities. You've got this! With a quick update and a security refresh, you'll be back on track and fortified against such attacks! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00503 · 42.1th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2025-11-06T21:16Z
References (1)
EPSS history
Timeline
  • 06 NOV 15:54Z
    WordPress s2Member Plugin <= 250701 - PHP Object Injection Vulnerability
    cvelistv5