CVE-2026-25429

Description

Deserialization of Untrusted Data vulnerability in wpdive Nexa Blocks nexa-blocks allows Object Injection.This issue affects Nexa Blocks: from n/a through <= 1.1.1.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Nexa Blocks <= 1.1.1

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target URL (Example)
target_url = "http://target.com/wp-admin/admin-ajax.php"

# Malicious serialized payload placeholder
# In a real scenario, this would be a serialized PHP object
# designed to trigger a gadget chain (e.g., __destruct)
payload = "O:8:\"stdClass\":1:{s:3:\"foo\";s:3:\"bar\";}"

data = {
    "action": "vulnerable_action", # Replace with actual parameter
    "data": payload
}

try:
    response = requests.post(target_url, data=data)
    print(f"Status Code: {response.status_code}")
    print(f"Response: {response.text}")
except Exception as e:
    print(f"Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-25429
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-25429
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-25429/
[4] VulDB https://vuldb.com/cve/CVE-2026-25429
[5] https://patchstack.com/database/Wordpress/Plugin/nexa-blocks/vulnerability/wordpress-nexa-blocks-plugin-1-1-1-php-object-injection-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-25429", "sourceIdentifier": "[email protected]", "published": "2026-03-25T17:16:50.460", "lastModified": "2026-04-24T16:35:20.070", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Deserialization of Untrusted Data vulnerability in wpdive Nexa Blocks nexa-blocks allows Object Injection.This issue affects Nexa Blocks: from n/a through <= 1.1.1."}, {"lang": "es", "value": "Vulnerabilidad de deserialización de datos no confiables en wpdive Nexa Blocks nexa-blocks permite la inyección de objetos. Este problema afecta a Nexa Blocks: desde n/a hasta <= 1.1.1."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-502"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/nexa-blocks/vulnerability/wordpress-nexa-blocks-plugin-1-1-1-php-object-injection-vulnerability?_s_id=cve", "source": "[email protected]"}]}}