WordPress WooCommerce Square Plugin <= 5.1.1 is vulnerable to a high priority Insecure Direct Object References (IDOR)

High priority Mitigate with Patchstack
<= 5.1.1Vulnerable version(s)
5.1.2Fixed version
WordPress plugin
No VDP
12 Jan, 2026

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Risks

CVSS 7.5

This vulnerability is highly dangerous and expected to become exploited.

7.5

Insecure Direct Object References (IDOR)

An insecure direct object reference vulnerability could allow a malicious actor to bypass authorization, authentication, access sensitive files/folders or interact with the database.

CVSS score is a way to evaluate and rank reported vulnerabilities in a standardized and repeatable way but which is not ideal for WordPress.

Solutions

We advise to mitigate or resolve the vulnerability immediately.

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Patchstack has issued a mitigation rule to block any attacks until you have updated to a fixed version.

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Update to version 5.1.2 or later.

Update to version 5.1.2 or later to resolve the vulnerability. Patchstack users can turn on auto-update for vulnerable plugins only.

Details

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WordPress plugin
No VDP

Timeline

Early warning sent out to Patchstack customers

12 Jan, 2026

Published by Patchstack

12 Jan, 2026

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