PHP Object Injection Vulnerability in Nexter Extension – Site Enhancements Toolkit for WordPress
CVE-2026-0726

8.1HIGH

Key Information:

Vendor

WordPress
Status
Nexter Extension – Site Enhancements Toolkit
Vendor
CVE Published:
20 January 2026

What is CVE-2026-0726?

The Nexter Extension – Site Enhancements Toolkit for WordPress has a security flaw allowing PHP Object Injection due to the deserialization of untrusted input in the 'nxt_unserialize_replace' function. This vulnerability affects all versions up to and including 4.4.6, potentially enabling unauthenticated attackers to inject a PHP object. However, it poses a threat primarily when paired with other plugins or themes that contain a PHP Object Pollution (POP) chain. In such cases, attackers could exploit this vulnerability to delete files, access sensitive data, or execute arbitrary code, leveraging the existing chains of vulnerable components.

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Affected Version(s)

Nexter Extension – Site Enhancements Toolkit * <= 4.4.6

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset?old_path=/ne...

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Craig Smith
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