# CVE-2026-39571: Themefic Instantio sensitive data exposure

Source: https://junglewise.ai/threats/cve-2026-39571-themefic-instantio-sensitive-data-exposure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-39571 · Severity: medium · CVSS 5.3 · Published 2026-04-08

Themefic Instantio, a WordPress plugin used to streamline the WooCommerce checkout process, contains a vulnerability that exposes sensitive system information. An unauthorized attacker could access data that is normally restricted, potentially gaining insights into the system's configuration or internal state. This information could be used to facilitate more complex attacks against the website.

Vendors: [Themefic](https://junglewise.ai/threats/vendors/themefic).

## Quick answers

**Is CVE-2026-39571 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39571 being exploited in the wild.

**How severe is CVE-2026-39571?** Medium severity, with a CVSS score of 5.3, published 8 April 2026.

**Which products and versions are affected?** Themefic Instantio <= 3.3.30.

**Is there a fix for CVE-2026-39571?** A patch was published on 2026-03-25: Version 3.3.31 released to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39571 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-39571?** Check whether you run Themefic Instantio at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Themefic Instantio plugin for WordPress (up to version 3.3.30) is vulnerable to CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere). The vulnerability allows an unauthenticated remote attacker to retrieve sensitive data embedded within the application's responses or system environment. This occurs because the software does not properly restrict access to sensitive system-level information from the network-reachable control sphere. Attackers can exploit this to gain technical details about the environment, which may assist in further exploitation. The issue is resolved in version 3.3.31.

## Affected products

- Themefic Instantio <= 3.3.30

## Timeline

- 2026-02-23: other: Vulnerability reported by researcher
- 2026-03-25: disclosed: Initial disclosure by Patchstack
- 2026-04-08: advisory: CVE published
- 2026-03-25: patched: Version 3.3.31 released to address the issue

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/Wordpress/Plugin/instantio/vulnerability/wordpress-instantio-plugin-3-3-30-sensitive-data-exposure-vulnerability?_s_id=cve](https://patchstack.com/database/Wordpress/Plugin/instantio/vulnerability/wordpress-instantio-plugin-3-3-30-sensitive-data-exposure-vulnerability?_s_id=cve)