CVE-2026-0726: CWE-502 Deserialization of Untrusted Data in posimyththemes Nexter Extension – Security, Performance, Code Snippets & Site Toolkit
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.
AI Analysis
Technical Summary
CVE-2026-0726 is a PHP Object Injection vulnerability in the Nexter Extension – Site Enhancements Toolkit WordPress plugin (versions up to 4.4.6). It arises from unsafe deserialization of untrusted input in the 'nxt_unserialize_replace' function. Without a POP chain in the plugin itself, exploitation requires the presence of an additional plugin or theme that provides a suitable POP chain to achieve code execution or other malicious actions. The vulnerability is remotely exploitable without authentication but requires high attack complexity. The CVSS v3.1 base score is 8.1, reflecting high impact on confidentiality, integrity, and availability if exploited.
Potential Impact
If exploited in an environment where a suitable POP chain exists via another installed plugin or theme, an attacker could execute arbitrary code, delete arbitrary files, or access sensitive data on the affected WordPress site. Without such a POP chain, this vulnerability does not have a direct impact. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or patch is currently available for this vulnerability. Site administrators should monitor the vendor's advisory channels for updates. In the meantime, limiting installation of untrusted plugins or themes that could provide a POP chain may reduce risk. Consider disabling or removing the Nexter Extension plugin if it is not essential. No vendor advisory indicating 'no action required' or 'already mitigated' is available.
CVE-2026-0726: CWE-502 Deserialization of Untrusted Data in posimyththemes Nexter Extension – Security, Performance, Code Snippets & Site Toolkit
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-0726 is a PHP Object Injection vulnerability in the Nexter Extension – Site Enhancements Toolkit WordPress plugin (versions up to 4.4.6). It arises from unsafe deserialization of untrusted input in the 'nxt_unserialize_replace' function. Without a POP chain in the plugin itself, exploitation requires the presence of an additional plugin or theme that provides a suitable POP chain to achieve code execution or other malicious actions. The vulnerability is remotely exploitable without authentication but requires high attack complexity. The CVSS v3.1 base score is 8.1, reflecting high impact on confidentiality, integrity, and availability if exploited.
Potential Impact
If exploited in an environment where a suitable POP chain exists via another installed plugin or theme, an attacker could execute arbitrary code, delete arbitrary files, or access sensitive data on the affected WordPress site. Without such a POP chain, this vulnerability does not have a direct impact. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or patch is currently available for this vulnerability. Site administrators should monitor the vendor's advisory channels for updates. In the meantime, limiting installation of untrusted plugins or themes that could provide a POP chain may reduce risk. Consider disabling or removing the Nexter Extension plugin if it is not essential. No vendor advisory indicating 'no action required' or 'already mitigated' is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-01-08T14:09:33.636Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 696fd2e84623b1157c48f867
Added to database: 1/20/2026, 7:09:28 PM
Last enriched: 4/17/2026, 11:43:39 AM
Last updated: 5/10/2026, 6:36:15 AM
Views: 182
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