ToTop Link <= 1.7.1 - Unauthenticated PHP Object Injection

9.0
Deserialization of Untrusted Data
CVE CVE-2021-24857
CVSS 9.0 (Critical)
Publicly Published November 15, 2021
Last Updated January 22, 2024
Researcher Muhammed Kara

Description

The ToTop Link WordPress plugin through 1.7.1 passes base64 encoded user input to the unserialize() PHP function, which could lead to PHP Object injection if a plugin installed on the blog has a suitable gadget chain.

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Vulnerability Details for ToTop Link

Software Type Plugin
Software Slug totop-link (view on wordpress.org)
Patched? No
Remediation No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
Affected Version
  • <= 1.7.1

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