CVE-2018-19420

LOW

GetSimpleCMS 3.3.15 - Unauthenticated Unrestricted Upload of File with Dangerous Type via Bypassed Extension Validation

Title source: llm
STIX 2.1

Description

In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but there are several alternative cases in which HTML can be executed, such as a file with no extension or an unrecognized extension (e.g., the test or test.asdf filename), because of admin/upload-uploadify.php, and validate_safe_file in admin/inc/security_functions.php.

References (1)

Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301

Scores

CVSS v3 3.8
EPSS 0.0078
EPSS Percentile 51.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Details

CWE
CWE-434
Status published
Products (1)
get-simple/getsimple_cms 3.3.15
Published Nov 21, 2018
Tracked Since Feb 18, 2026