Catch Themes Demo Import <= 1.7 - Arbitrary File Upload
Strategic Overview
- Status
- Patched in 1.8
- Affected Plugin
- Catch Themes Demo Import
- Affected Version
<= 1.7- CVSS
- 7.2High
- Weakness type
- CWE-434 · Unrestricted Upload of File with Dangerous Type
- CVE
CVE-2021-39352
At a glance
CVE-2021-39352 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Catch Themes Demo Import WordPress plugin, affecting versions <= 1.7. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). The issue is fixed in version 1.8; sites on affected versions should update now. Disclosed October 2021, reported by Thinkland Security Team.
Vulnerability Overview
The Catch Themes Demo Import WordPress plugin is vulnerable to arbitrary file uploads via the import functionality found in the ~/inc/CatchThemesDemoImport.php file, in versions up to and including 1.7, due to insufficient file type validation. This makes it possible for an attacker with administrative privileges to upload malicious files that can be used to achieve remote code execution.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-434: Unrestricted Upload of File with Dangerous Type
Reaching this weakness in Catch Themes Demo Import <= 1.7 takes a caller who can reach the endpoint. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.
If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For Catch Themes Demo Import the fix is 1.8: builds <= 1.7 are affected, anything from 1.8 onward is not.
Remediation
Update to version 1.8, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Catch Themes Demo Import: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Catch Themes Demo Import 1.8 closes this, and updating the plugin is the step that ends it.
- Firewall
- Scanner
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Catch Themes Demo Import
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