Low severity · published Nov 21, 2018
CVE-2018-19420
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…
3.8
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GC
Getsimple Cms · Get-simple
3.3.15 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-19420
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-19420
Exploit
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301
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