Yet Another Stars Rating <= 1.8.6 - Unauthenticated PHP Object Injection

9.8
Deserialization of Untrusted Data
CVSS 9.8 (Critical)
Publicly Published January 27, 2019
Last Updated January 22, 2024
Researcher Paul Dannewitz

Description

The Yet Another Stars Rating plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.8.6 via deserialization of untrusted input from the unserialize() function found in the yasr-shortcode-functions.php file. This allows unauthenticated attackers to inject a PHP Object. The additional presence of a POP chain allows attackers to remotely execute arbitrary code.

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Vulnerability Details for YASR – Yet Another Star Rating Plugin for WordPress

Software Type Plugin
Software Slug yet-another-stars-rating (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.8.7, or a newer patched version
Affected Version
  • <= 1.8.6
Patched Version
  • 1.8.7

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