Strategic Overview
- Status
- Unpatched
- Affected Theme
- Fusion
- Affected Version
<= 3.1- CVSS
- 8.8High
- Weakness type
- CWE-434 · Unrestricted Upload of File with Dangerous Type
- CVE
CVE-2015-2194
At a glance
CVE-2015-2194 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Fusion WordPress theme, affecting versions <= 3.1. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). No fixed release has been reported yet; treat installations running this software as exposed. Disclosed February 2015, reported by A. Samman.
Vulnerability Overview
Unrestricted file upload vulnerability in the fusion_options function in functions.php in the Fusion theme 3.1 for Wordpress allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension in a fusion_save action, then accessing it via unspecified vectors.
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 Fusion <= 3.1 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. No fixed build of this theme is recorded for Fusion yet, so installs running <= 3.1 stay exposed until the vendor ships one.
Remediation
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
How does WordSec protect against this?
The attempt arrives as an ordinary request to Fusion: 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. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.
- Firewall
- Scanner
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C