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CVE-2026-0726

Nexter Extension – Site Enhancements Toolkit <= 4.4.6 - Unauthenticated PHP Object Injection via 'nxt_unserialize_replace'

Published: Jan 20, 2026Updated: Jan 26, 2026 Sources: CVE List NVDCWE-502
NVD MITRE
8.1CVSSHIGH
EPSS Score
0.5%
Top 62.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
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Description

The Nexter Extension – Site Enhancements Toolkit plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.4.6 via deserialization of untrusted input in the 'nxt_unserialize_replace' function. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-502

Affected Products

Nexter Extension – Security, Performance, Code Snippets & Site Toolkitposimyththemes
On-prem
Web & CMS Plugins / wordpress-plugin
posimyththemescommercialWeb & CMS Pluginsaka posimyth themes, posimyththemes.com

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

https://plugins.trac.wordpress.org/changeset?old_path=/nexter-extension/tags/4.4.6/include/panel-settings/extensions/nexter-ext-replace-url.php&new_path=/nexter-extension/tags/4.4.7/include/panel-settings/extensions/nexter-ext-replace-url.php
plugins.trac.wordpress.org
https://www.wordfence.com/threat-intel/vulnerabilities/id/02de9287-68e4-46ce-a491-3f6cbb7fc0ed?source=cve
wordfence.com

Timeline

Published
Jan 20, 2026
Last Updated
Jan 26, 2026

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