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.

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)

EPSS: 0.009 (54.7th percentile) — read the EPSS interpretation.

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.

Affected products

Cmsmadesimple Cms_made_simple — versions 2.2.3.1
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

0xT11/CVE-POC

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC, 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.