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Vulnerabilities

Vulnerability · CVE-2026-0726

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 untru

Published Jan 20, 2026 · catalog updated Apr 14, 2026 · Nexter Extension – Security, Performance, Code Snippets & Site Toolkit

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-0726. EPSS is 0.57%. Act only if a listed version of Nexter Extension – Security, Performance, Code Snippets & Site Toolkit is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.57%
Remediation
Vendor / distro source
Affected products
vendor posimyththemes Nexter Extension – Security, Performance, Code Snippets & Site Toolkit 0 ≤4.4.6

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 t

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor posimyththemes Nexter Extension – Security, Performance, Code Snippets & Site Toolkit 0 ≤4.4.60 ≤4.4.6

How to fix CVE-2026-0726

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-0726. EPSS is 0.57%. Act only if a listed version of Nexter Extension – Security, Performance, Code Snippets & Site Toolkit is installed.

Which versions are affected?

Compare what you have installed with posimyththemes Nexter Extension – Security, Performance, Code Snippets & Site Toolkit 0 ≤4.4.6 0 ≤4.4.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.57%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 20, 2026 · EUVD

    Detected

    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

  2. Apr 14, 2026 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2026-0726

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-0726

    30-day exploitation probability 0.57%

    first.org
  • EUVDVulnerability recordEUVD-2026-3405

    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 att

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • FIRST EPSSNov 3, 2026
  • EUVDNov 2, 2026