EUVD-2026-66939
GHSA-8fp2-8xxx-p64x
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Editor is network-accessible but requires administrator authentication (PR:H); full C/I/A impact is consistent with arbitrary-code execution via deserialization POP chain.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Editor PHP Object Injection in Fluent Boards Pro <= 2.0.11 versions.
AnalysisAI
PHP Object Injection in the Fluent Boards Pro WordPress plugin (versions 2.0.11 and earlier) allows authenticated administrators to pass arbitrary serialized PHP data through the editor component, triggering unsafe deserialization on the server and potentially achieving remote code execution, file writes, or full system compromise. The vulnerability is classified as CWE-502 and carries a CVSS 3.1 score of 7.2 (High), with full Confidentiality, Integrity, and Availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid WordPress administrator account - CVSS PR:H confirms high-privilege authentication is mandatory. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H) accurately reflects the primary constraint: exploitation requires administrator-level authentication (PR:H), which significantly limits the realistic attacker pool to compromised admin accounts or insider threats rather than opportunistic internet-scale attacks. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained WordPress administrator credentials - via phishing, credential reuse, or a separate vulnerability - logs into the admin panel and navigates to the Fluent Boards Pro editor. The attacker submits a crafted HTTP request containing a malicious serialized PHP object; the plugin deserializes it without validation, triggering a POP chain using autoloaded WordPress or plugin classes, resulting in arbitrary PHP code execution on the underlying web server. … |
| Remediation | Update Fluent Boards Pro to a version newer than 2.0.11 immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all WordPress installations for Fluent Boards Pro versions 2.0.11 or earlier and review which staff hold administrator credentials for affected deployments. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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