Arbitrary file upload in Microsoft Windows
CVE-2021-4225
The SP Project & Document Manager WordPress plugin before 4.24 allows any authenticated users, such as subscribers, to upload files. The plugin attempts to prevent PHP and other similar files that could be executed on the server from being uploaded by checking the file extension. It was discovered that on Windows servers, the security checks in place were insufficient, enabling bad actors to potentially upload backdoors on vulnerable sites.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: +0.000
Affected products
- Microsoft Windows
- Smartypantsplugins Sp Project \& Document Manager
- Sp Project & Document Manager — versions 4.24
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/bd1083d1-edcc-482e-a8a9-c8b6c8d417bd (Exploit, Third Party Advisory)
- github.com/pang0lin/CVEproject/blob/main/wordpress_SP-Project_fileupload.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-4225?
- CVE-2021-4225 is a high-severity vulnerability in Microsoft Windows, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2022-04-25.
- How severe is CVE-2021-4225?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-4225 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.