CVE-2026-39571

Instantio <= 3.3.30 - Unauthenticated Information Exposure

mediumExposure of Sensitive Information to an Unauthorized Actor

5.3

CVSS Score

5.3

CVSS Score

medium

Severity

3.3.31

Patched in

42d

Time to patch

Description

The Instantio — Side Cart & One-Page Checkout for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.3.30. This makes it possible for unauthenticated attackers to extract sensitive user or configuration data.

CVSS Vector Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Low

Confidentiality

None

Integrity

None

Availability

Technical Details

Affected versions<=3.3.30

PublishedMarch 25, 2026

Last updatedMay 5, 2026

Affected plugininstantio

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/d0a818b6-5e25-4c96-8757-b8593c713923?source=api-prod

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