Deserialization of untrusted data in posimyththemes Nexter Extension – Security…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| posimyththemes | Nexter Extension – Security, Performance, Code Snippets & Site Toolkit | up to 4.4.6 | — | No fix listed | CNA |
- Nexter Extension – Security, Performance, Code Snippets & Site Toolkit Vendorposimyththemes Affected up to 4.4.6 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-0726
- 2026-10-03 Alias added: GHSA-wh27-24q4-8pfv
References
Other 2
- https://www.wordfence.com/threat-intel/vulnerabilities/id/02de9287-68e4-46ce-a491-3f6cbb7fc0ed?source=cve
- 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
More posimyththemes vulnerabilities
- TI-2023-25501 WordPress The Plus Addons for Elementor Pro plugin <= 5.2.8 - Unauthenticated Local File Inclusion vulnerability CVSS 3.1CRITICAL 9.8
- TI-2021-06467 The Plus Addons for Elementor Page Builder < 4.1.7 - Authentication Bypass CVSS 3.1CRITICAL 9.8
- TI-2023-24458 WordPress Nexter Theme <= 2.0.3 is vulnerable to SQL Injection CVSS 3.1CRITICAL 9.8
- TI-2021-07228 The Plus Addons for Elementor Pro < 5.0.7 - Unauthenticated SQL Injection CVSS 3.1CRITICAL 9.8
- TI-2021-03189 Missing authorization in posimyththemes The Plus Addons for Elementor – Addons for… CVSS 3.1HIGH 8.8
- TI-2024-05069 The Plus Addons for Elementor – Elementor Addons, Page Templates, Widgets, Mega Menu… CVSS 3.1HIGH 8.8
Sources
- CVE-2026-0726 · CVE Program
- CVE-2026-0726 · NVD
- FIRST EPSS
- GHSA-wh27-24q4-8pfv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences