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5.4

CMS Made Simple 2.2.3.1 allows dangerous files to be uploaded

CVE-2017-16798 · published 8 years ago
Summary

The file upload feature in CMS Made Simple version 2.2.3.1 does not correctly block certain file types, letting attackers upload scripts or malicious files such as .phtml, .svg, or .html. This could let unauthorized users place harmful code on your site or launch cross‑site scripting attacks. Update to a patched version or apply a fix that blocks all executable file types during upload.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
cmsmadesimple cms_made_simple 2.2.3.1
cpe:2.3:a:cmsmadesimple:cms_made_simple:2.2.3.1:*:*:*:*:*:*:*
Original advisory text
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 attack...
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.4 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published12 Nov 2017
Updated3 Nov 2026
First seen29 Sep 2026
Sources
CVE-2017-16798 · NVD
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