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VulnerabilityPublished

CVE-2026-119039: Defender Security (WordPress plugin) · Authentication Bypass by Spoofing

Affects Defender Security (WordPress plugin)Source CVE Database V5

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Not known to be exploited : upgrade to 6.4.1 soon.

Data as of 12 Nov 2026, 06:20 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 6.4.1

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade Defender Security (WordPress plugin) to 6.4.1.

Affected software

ProductAffectedFixed in
Defender SecurityAffected
  • >=4.9.0 <6.4.1
Fixed in
  • 6.4.1

AI-suggested

Upgrade the Defender Security WordPress plugin to version 6.4.1 or later, where this vulnerability is fixed. No other mitigation is required as the official fix addresses the issue.

Description

The Defender Security WordPress plugin versions from 4.9.0 up to but not including 6.4.1 contain an authentication bypass vulnerability. This flaw allows unauthenticated attackers to spoof their IP address because the plugin does not verify that the client IP used for firewall and lockout decisions comes from a trusted source. Exploitation enables attackers to evade IP-based protections such as login lockout and IP banning, impersonate allowlisted IP addresses, and poison activity logs. The issue is fixed in version 6.4.1.

References

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