CVE-2026-25429 CRITICAL

CVE-2026-25429: WordPress Nexa Blocks plugin <= 1.1.1 - PHP Object Injection vulnerability

Vendor Wpdive

Product Nexa Blocks

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 wpdive Nexa Blocks nexa-blocks allows Object Injection.This issue affects Nexa Blocks: from n/a through <= 1.1.1.

Explanation of Vulnerability in Simple Terms

02Summary

Nexa Blocks versions 1.1.1 and earlier contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on affected sites. The vulnerability requires no user interaction and can be exploited remotely over the network. An attacker can gain full control of the site, including reading sensitive data, modifying content, and disrupting service.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site and gain full administrative control without authentication.

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

March 25, 2026 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-25429 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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