The Mark Stockton Quicksand Post Filter jQuery Plugin suffers from a CWE-862 Missing Authorization vulnerability in versions up to 3.1.1. This means the plugin does not properly enforce authorization checks, allowing unauthenticated or unauthorized users to perform actions that should be restricted. The CVSS 3.1 base score is 5.3 (medium severity), with network attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality or availability impact, but with integrity impact. No patch or official remediation is currently documented.

Unauthorized users may be able to perform actions that require authorization, potentially leading to unauthorized modification of data or behavior within applications using the vulnerable plugin. There is no impact on confidentiality or availability reported. No known exploits are currently observed in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider restricting access to the plugin's functionality or applying custom authorization checks at the application level to mitigate unauthorized use.