The Migration, Backup, Staging – WPvivid Backup & Migration plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Upload in versions up to and including 0.9.123. This is due to improper error handling in the RSA decryption process combined with a lack of path sanitization when writing uploaded files. When the plugin fails to decrypt a session key using openssl_private_decrypt(), it does not terminate execution and instead passes the boolean false value to the phpseclib library's AES cipher initialization. The library treats this false value as a string of null bytes, allowing an attacker to encrypt a malicious payload using a predictable null-byte key. Additionally, the plugin accepts filenames from the decrypted payload without sanitization, enabling directory traversal to escape the protected backup directory. This makes it possible for unauthenticated attackers to upload arbitrary PHP files to publicly accessible directories and achieve Remote Code Execution via the wpvivid_action=send_to_site parameter.
History

Thu, 12 Feb 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 11 Feb 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Wpvividplugins
Wpvividplugins migration Backup Staging Wpvivd Backup And Migration
Vendors & Products Wordpress
Wordpress wordpress
Wpvividplugins
Wpvividplugins migration Backup Staging Wpvivd Backup And Migration

Wed, 11 Feb 2026 05:45:00 +0000

Type Values Removed Values Added
Description The Migration, Backup, Staging – WPvivid Backup & Migration plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Upload in versions up to and including 0.9.123. This is due to improper error handling in the RSA decryption process combined with a lack of path sanitization when writing uploaded files. When the plugin fails to decrypt a session key using openssl_private_decrypt(), it does not terminate execution and instead passes the boolean false value to the phpseclib library's AES cipher initialization. The library treats this false value as a string of null bytes, allowing an attacker to encrypt a malicious payload using a predictable null-byte key. Additionally, the plugin accepts filenames from the decrypted payload without sanitization, enabling directory traversal to escape the protected backup directory. This makes it possible for unauthenticated attackers to upload arbitrary PHP files to publicly accessible directories and achieve Remote Code Execution via the wpvivid_action=send_to_site parameter.
Title Migration, Backup, Staging <= 0.9.123 - Unauthenticated Arbitrary File Upload
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2026-02-11T05:30:11.054Z

Updated: 2026-02-11T15:46:38.325Z

Reserved: 2026-01-22T20:12:20.756Z

Link: CVE-2026-1357

cve-icon Vulnrichment

Updated: 2026-02-11T15:46:31.502Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-11T06:15:51.677

Modified: 2026-02-11T15:27:26.370

Link: CVE-2026-1357

cve-icon Redhat

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