Arbitrary file upload in Monstra
CVE-2017-18048
Monstra CMS 3.0.4 allows users to upload arbitrary files, which leads to remote command execution on the server, for example because .php (lowercase) is blocked but .PHP (uppercase) is not.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.634 (99.2th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.594 · newest: 0.634 · change: +0.040
Affected products
- Monstra — versions 3.0.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/monstra-cms/monstra/issues/426 (Patch, Third Party Advisory)
- www.exploit-db.com/exploits/43348/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- securityprince.blogspot.in/2017/12/monstra-cms-304-arbitrary-file-upload.html (Exploit, Third Party Advisory)
- blogs.securiteam.com/index.php/archives/3559 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-18048?
- CVE-2017-18048 is a high-severity vulnerability in Monstra, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2018-01-23.
- How severe is CVE-2017-18048?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2017-18048 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.