CVE-2026-1357
Migration, Backup, Staging <= 0.9.123 - Unauthenticated Arbitrary File Upload
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.
INFO
Published Date :
Feb. 11, 2026, 6:15 a.m.
Last Modified :
Feb. 11, 2026, 6:15 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE |
Solution
- Update the WPvivid Backup & Migration plugin.
- Verify plugin configurations and file permissions.
- Remove any unauthorized uploaded files.
Public PoC/Exploit Available at Github
CVE-2026-1357 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-1357.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-1357 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-1357
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Exploit CVE-2026-1357
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-1357 vulnerability anywhere in the article.
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security.nl
Half miljoen WordPress-sites missen update voor kritiek RCE-lek in plug-in
Ruim een half miljoen WordPress-sites missen een belangrijke beveiligingsupdate voor een kritieke kwetsbaarheid in een plug-in, die remote code execution (RCE) door ongeauthenticeerde aanvallers mogel ... Read more
The following table lists the changes that have been made to the
CVE-2026-1357 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Feb. 11, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-434 Added Reference https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.122/includes/class-wpvivid-crypt.php#L58 Added Reference https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.122/includes/customclass/class-wpvivid-send-to-site.php#L629 Added Reference https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.123/includes/class-wpvivid-crypt.php#L58 Added Reference https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/tags/0.9.123/includes/customclass/class-wpvivid-send-to-site.php#L629 Added Reference https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/trunk/includes/class-wpvivid-crypt.php#L58 Added Reference https://plugins.trac.wordpress.org/browser/wpvivid-backuprestore/trunk/includes/customclass/class-wpvivid-send-to-site.php#L629 Added Reference https://plugins.trac.wordpress.org/changeset/3448386/wpvivid-backuprestore#file1 Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/e5af0317-ef46-4744-9752-74ce228b5f37?source=cve