Medium severity5.4NVD Advisory· Published Nov 12, 2017· Updated Jun 17, 2026
CVE-2017-16798
CVE-2017-16798
Description
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.
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Affected products
2- cpe:2.3:a:cmsmadesimple:cms_made_simple:2.2.3.1:*:*:*:*:*:*:*
- Range: = 2.2.3.1
Patches
Vulnerability mechanics
References
1- github.com/bsmali4/cve/blob/master/CMS%20Made%20Simple%20UPLOAD%20FILE%20XSS.mdnvdIssue TrackingThird Party Advisory
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