EUVD-2026-89883
GHSA-9p7v-f536-9r4c
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Contributor account gives PR:L over the network with no interaction; CWE-502 object injection with a reachable gadget chain yields full C/I/A, matching the vendor vector.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Contributor PHP Object Injection in Themify Builder <= 7.8.1 versions.
AnalysisAI
Authenticated Contributor-level users can exploit a PHP Object Injection vulnerability in Themify Builder versions up to and including 7.8.1. The flaw, caused by unsafe deserialization (CWE-502), allows an attacker with a Contributor account to inject a serialized PHP object, potentially leading to remote code execution or full site compromise if a usable PHP gadget chain exists in the WordPress installation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated WordPress account at Contributor role or higher (PR:L) on a site running Themify Builder version 7.8.1 or earlier - sites that disable contributor-level registration or restrict untrusted authors are largely out of scope. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-supplied CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H = 8.8) rates this High/Critical, driven by network reach, low complexity, no user interaction, and full C/I/A impact. … 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 | As of this analysis, no vendor-released patch has been identified for CVE-2026-96831. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WordPress sites using Themify Builder versions up to and including 7.8.1 and disable the plugin if not essential, or restrict Contributor-level accounts to trusted users only. …
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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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