Easy Digital Downloads – Upload File <= 1.0.4 - Arbitrary File Upload/Deletion
Strategic Overview
- Status
- Patched in 1.0.4
- Affected Plugin
- Easy Digital Downloads – Upload File
- Affected Version
<= 1.0.3- CVSS
- 9.8Critical
- Weakness type
- CWE-434 · Unrestricted Upload of File with Dangerous Type
- CVE
CVE-2015-9530
At a glance
CVE-2015-9530 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Easy Digital Downloads WordPress plugin, affecting versions <= 1.0.3. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.0.4; sites on affected versions should update now. Disclosed April 2015, reported by James Golovich.
Vulnerability Overview
The Easy Digital Downloads – Upload File for WordPress is vulnerable to Arbitrary File Upload/Delete and Remote Code Execution via the 'edd_upload_file_delete', 'edd_upload_file_view_files', and 'create_upload_dir' functions in versions up to, and including, 1.0.4. This makes it possible for authenticated attackers to upload/delete system files and execute arbitrary code remotely.
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 privileges on the target site, 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
Easy Digital Downloads <= 1.0.3 carries this weakness at edd_upload_file_delete, and reaching it 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 Easy Digital Downloads the fix is 1.0.4: builds <= 1.0.3 are affected, anything from 1.0.4 onward is not.
Remediation
Update to version 1.0.4, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Easy Digital Downloads: 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: Easy Digital Downloads 1.0.4 closes this, and updating the plugin is the step that ends it.
- Firewall
- Scanner
- Alerts
External References
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