XSS in Cmsmadesimple Cms Made Simple
CVE-2017-16798
In CMS Made Simple 2.2.3.1, the is_file_acceptable function in modules/FileManager/action.upload.php only blocks file extensions that begin or end with a "php" substring, which allows remote attackers to bypass intended access restrictions or trigger XSS via other extensions, as demonstrated by .phtml, .pht, .html, or .svg.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Cmsmadesimple Cms Made Simple — versions 2.2.3.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/bsmali4/cve/blob/master/CMS Made Simple UPLOAD FILE XSS.md (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2017-16798?
- CVE-2017-16798 is a medium-severity vulnerability in Cmsmadesimple Cms Made Simple, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-11-12.
- How severe is CVE-2017-16798?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2017-16798 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.