Migration, Backup, Staging <= 0.9.123 - Unauthenticated Arbitrary File Upload
| CVE | CVE-2026-1357 |
|---|---|
| CVSS | 9.8 (Critical) |
| Publicly Published | February 10, 2026 |
| Last Updated | February 11, 2026 |
| Researcher |
Lucas Montes (NiRoX)
|
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.
Wordfence blocked 1,458 attacks targeting this vulnerability in the past 24 hours.
Learn more about Arbitrary File Upload vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for WPvivid — Backup, Migration & Staging
| Software Type | Plugin |
|---|---|
| Software Slug | wpvivid-backuprestore (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 0.9.124, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in WPvivid — Backup, Migration & Staging
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