Themefic Instantio Plugin up to 3.3.30 on WordPress information expsure

Summaryinfo

A vulnerability identified as problematic has been detected in Themefic Instantio Plugin up to 3.3.30 on WordPress. The impacted element is an unknown function. The manipulation leads to information expsure. This vulnerability is traded as CVE-2026-39571. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Themefic Instantio Plugin up to 3.3.30 on WordPress and classified as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a information expsure vulnerability. Using CWE to declare the problem leads to CWE-497. The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does. Impacted is confidentiality. The summary by CVE is:

Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in Themefic Instantio instantio allows Retrieve Embedded Sensitive Data.This issue affects Instantio: from n/a through <= 3.3.30.

The weakness was shared by Que Thanh Tuan. It is possible to read the advisory at patchstack.com. The identification of this vulnerability is CVE-2026-39571 since 04/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• Themefic

Name

• Instantio Plugin

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.3.7
• 3.3.8
• 3.3.9
• 3.3.10
• 3.3.11
• 3.3.12
• 3.3.13
• 3.3.14
• 3.3.15
• 3.3.16
• 3.3.17
• 3.3.18
• 3.3.19
• 3.3.20
• 3.3.21
• 3.3.22
• 3.3.23
• 3.3.24
• 3.3.25
• 3.3.26
• 3.3.27
• 3.3.28
• 3.3.29
• 3.3.30

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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