CVE-2026-39571

MEDIUM 5.3

WordPress Instantio plugin <= 3.3.30 - Sensitive Data Exposure vulnerability

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-497
Vendor	themefic
Product	instantio
Published	Apr 8, 2026
Last Updated	Apr 29, 2026

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CVSS v3 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

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

Themefic / Instantio

0 ≤ 3.3.30

References

NVD ↗ CVE.org ↗ EPSS Data ↗

patchstack.com: https://patchstack.com/database/Wordpress/Plugin/instantio/vulnerability/wordpress-instantio-plugin-3-3-30-sensitive-data-exposure-vulnerability?_s_id=cve

Credits

Que Thanh Tuan | Patchstack Bug Bounty Program