CVE-2025-67911 — AI Deep Analysis Summary

🚨 **Essence**: Untrusted data deserialization in Newsletters plugin. 💥 **Consequences**: Object Injection. Attackers can manipulate PHP objects, leading to full system compromise.

🛡️ **Root Cause**: CWE-502 (Deserialization of Untrusted Data). The plugin fails to validate/sanitize data before passing it to PHP's deserialization functions.

📦 **Affected**: WordPress Plugin **Newsletters** by Tribulant Software. Versions **4.11 and earlier** are vulnerable.

🕵️ **Attacker Capabilities**: High Impact (CVSS H). Can achieve **Remote Code Execution (RCE)**, data theft, and system takeover. No authentication required.

🔓 **Exploitation Threshold**: **LOW**. CVSS Vector: AV:N/AC:L/PR:N/UI:N/S:U. Network accessible, Low complexity, No privileges, No user interaction needed.

💻 **Public Exploit**: **No PoC available** in the provided data. However, the vulnerability type (Object Injection) is highly exploitable if logic is understood.

🔍 **Self-Check**: Scan for **Newsletters plugin** version < 4.11. Look for PHP deserialization calls in plugin code. Use vulnerability scanners targeting CWE-502.

🛠️ **Official Fix**: Update to the latest version of Newsletters plugin. Patchstack and vendor advisories confirm the issue exists in 4.11, implying newer versions are patched.

🚧 **No Patch Workaround**: Disable the plugin immediately. If required, restrict access via firewall/WAF. Monitor for unusual PHP activity. **Backup** before any changes.

⚡ **Urgency**: **CRITICAL**. CVSS Score is High (likely 9.8+). Remote, unauthenticated, high impact. **Patch immediately** to prevent RCE.