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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Essence**: Untrusted input causes **PHP Object Injection** via unsafe deserialization in Everest Forms. 💥 **Consequences**: Full server compromise, data theft, and system takeover due to high CVSS score (H/H/H).
Q2Root Cause? (CWE/Flaw)
🛡️ **Root Cause**: **CWE-502** (Deserialization of Untrusted Data). The plugin fails to validate inputs before passing them to PHP deserialization functions, allowing malicious object creation.
Q3Who is affected? (Versions/Components)
📦 **Affected**: **Everest Forms** plugin for WordPress. Specifically versions **3.1.1 and earlier**. Vendor: **wpeverest**. Product: Contact Form, Payment Form, Quiz, Survey & Custom Form Builder.
Q4What can hackers do? (Privileges/Data)
💀 **Attacker Capabilities**: With **CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H**, attackers can achieve **High Confidentiality**, **Integrity**, and **Availability** impact.…
🔓 **Exploitation Threshold**: **LOW**. Vector: Network (AV:N), Complexity: Low (AC:L), Privileges Required: None (PR:N), User Interaction: None (UI:N). No login or user click needed!
Q6Is there a public Exp? (PoC/Wild Exploitation)
🧪 **Public Exploit**: **No PoC provided** in the data (pocs: []). However, references to WordFence and WordPress Trac suggest active analysis. Wild exploitation is likely given the low barrier.
Q7How to self-check? (Features/Scanning)
🔍 **Self-Check**: Scan for **Everest Forms** plugin version < 3.1.2. Look for deserialization calls in `includes/admin/views/html-admin-page-entries-view.php` around line 147. Use WP security scanners.
Q8Is it fixed officially? (Patch/Mitigation)
✅ **Official Fix**: **Yes**. Patch released in changeset **3268742** on WordPress Trac. Update to the latest version immediately to mitigate the vulnerability.
Q9What if no patch? (Workaround)
🚧 **No Patch Workaround**: Disable the **Everest Forms** plugin entirely if updating isn't possible. Restrict admin access via firewall/WAF to block unauthorized deserialization attempts.
Q10Is it urgent? (Priority Suggestion)
🔥 **Urgency**: **CRITICAL**. CVSS is high, exploitation is easy (no auth), and impact is severe. Patch **immediately** upon release or upgrade to the fixed version.