CVE-2026-39571
Information Exposure in Themefic Instantio ≤ 3.3.30 Allows Data Retrieval
Publication date: 2026-04-08
Last updated on: 2026-04-13
Assigner: Patchstack
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| themefic | instantio | to 3.3.30 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-39571 is a vulnerability in the WordPress Instantio Plugin (versions up to and including 3.3.30) that allows unauthenticated attackers to access sensitive system information that should normally be restricted.
This exposure of sensitive data can potentially enable further exploitation of the affected system.
The vulnerability is classified under the OWASP Top 10 category A3: Sensitive Data Exposure and has a CVSS score of 5.3, indicating a low severity impact.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability in the Instantio plugin allows unauthorized access to sensitive information, which can lead to exposure of data that should be protected. Such exposure can potentially result in non-compliance with data protection regulations like GDPR and HIPAA, which mandate the safeguarding of sensitive personal and health information.
Although the vulnerability is rated as low severity (CVSS 5.3), the unauthorized disclosure of sensitive data can still pose risks to compliance by increasing the likelihood of data breaches and unauthorized data access.
Therefore, organizations using the affected plugin should promptly apply the patch (version 3.3.31 or later) to mitigate the risk and help maintain compliance with relevant data protection standards.
How can this vulnerability impact me? :
This vulnerability allows attackers with no privileges to retrieve sensitive information from the affected Instantio plugin.
Such exposure can lead to further exploitation of the system, potentially compromising the security and integrity of your website or application.
Although the severity is considered low, these types of vulnerabilities are often targeted in mass campaigns affecting many websites indiscriminately.
To mitigate the risk, users should update the plugin to version 3.3.31 or later.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability affects WordPress sites using the Instantio plugin version 3.3.30 or earlier. Detection involves identifying if the vulnerable plugin version is installed.
You can check the installed plugin version on your WordPress site by running commands to list plugins and their versions.
- Use WP-CLI command: wp plugin list | grep instantio
- Check the plugin version in the WordPress admin dashboard under Plugins.
Additionally, monitoring for unusual HTTP requests that attempt to retrieve sensitive data from the Instantio plugin endpoints may help detect exploitation attempts, but specific commands or signatures are not provided.
What immediate steps should I take to mitigate this vulnerability?
The primary mitigation step is to update the Instantio plugin to version 3.3.31 or later, where the vulnerability has been patched.
If immediate updating is not possible, consider disabling the Instantio plugin temporarily to prevent exploitation.
Implementing auto-updates for plugins can help ensure timely patching of vulnerabilities in the future.
Monitor your site for any suspicious activity or unauthorized access attempts related to the plugin.