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Vulnerabilities

Vulnerability · CVE-2026-1357

WPvivid migration\,_backup\,_staging Unrestricted Upload of File with Dangerous Type

Published Feb 11, 2026 · catalog updated Feb 11, 2026 · WPvivid WPvivid Backup and Migration Plugin

Patch now

CVE-2026-1357 is in the CISA known-exploited catalog. Confirm WPvivid WPvivid Backup and Migration Plugin against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
35.12%
Remediation
Remediation guidance
Affected products
stated WPvivid Backup and Migration Plugin · vendor WPvivid WPvivid Backup and Migration Plugin

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 Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated WPvivid Backup and Migration Plugin<= 0.9.123
  • vendor WPvivid WPvivid Backup and Migration Pluginversion unspecified

How to fix CVE-2026-1357

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-1357 is in the CISA known-exploited catalog. Confirm WPvivid WPvivid Backup and Migration Plugin against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with WPvivid Backup and Migration Plugin <= 0.9.123. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 35.12%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 11, 2026 · VulnCheck KEV

    Detected

    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

  2. Feb 11, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-1357

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-1357

    30-day exploitation probability 35.1%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-1357

    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 sanit

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.