CVE-2026-24989 CRITICAL

CVE-2026-24989: WordPress SUMO Affiliates Pro plugin < 11.4.0 - PHP Object Injection vulnerability

Vendor Fantasticplugins

Product SUMO Affiliates Pro

Weakness CWE-502 · Unsafe deserialization

Published March 25, 2026

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 FantasticPlugins SUMO Affiliates Pro affs allows Object Injection.This issue affects SUMO Affiliates Pro: from n/a through < 11.4.0.

Explanation of Vulnerability in Simple Terms

02Summary

SUMO Affiliates Pro versions up to 11.4.0 contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on the site. The plugin unsafely processes serialized data from untrusted sources without validation. An attacker can exploit this remotely over the network without user interaction to gain full control of the WordPress installation.

What an attacker can do

03Attacker Capabilities

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

Potential impact on your site

04Site Impact

Complete compromise of your site, including data theft, malware injection, and defacement.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

March 25, 2026 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-24989 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

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