EUVD-2026-66874
GHSA-gcw4-cf9q-c2x6
Severity by source
AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
S:C assigned over NVD's S:U because exploitation explicitly crosses site-isolation boundaries to execute code across the entire multisite network.
Primary rating from Vendor (wpscan).
CVSS VectorVendor: wpscan
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionCVE.org
The Defender Security WordPress plugin before 6.2.0 does not restrict a network-wide setting to network administrators, allowing an administrator of any single site on a multisite network to execute arbitrary code across the entire network.
AnalysisAI
Arbitrary code execution across entire WordPress multisite networks is possible in the Defender Security plugin (versions 5.0.0 through 6.1.x) due to a missing access control check on a network-wide setting. Any site-level administrator on a multisite installation - a role with significantly lower trust than a network/super administrator - can modify this setting to inject and execute code affecting all sites on the network. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated WordPress site administrator account - not a network/super administrator - on a WordPress multisite installation running Defender Security plugin versions 5.0.0 through 6.1.x. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.1 score of 6.6 reflects meaningful constraints: PR:H (requires site administrator credentials) and AC:H (requires a WordPress multisite deployment, not a default single-site install). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Defender Security to version 6.2.0 or later, the vendor-confirmed patched release that correctly restricts the network-wide setting to network administrators. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-94 – Code Injection
View allSame technique Code Injection
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External POC / Exploit Code
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