Multiple vulnerabilities in GetSimple CMS
| Risk | Low |
| Patch available | NO |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2018-19420 CVE-2018-19421 CVE-2018-17835 |
| CWE-ID | CWE-434 CWE-79 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
GetSimple CMS Web applications / CMS |
| Vendor | GetSimple CMS |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Arbitrary file upload
EUVDB-ID: #VU36391
Risk: Low
CVSSv3.1: 3.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-19420
CWE-ID:
CWE-434 - Unrestricted Upload of File with Dangerous Type
Exploit availability: No
DescriptionThe vulnerability allows a remote privileged user to read and manipulate data.
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.
MitigationInstall update from vendor's website.
Vulnerable software versionsGetSimple CMS: 3.3.15
External linkshttp://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Arbitrary file upload
EUVDB-ID: #VU36392
Risk: Low
CVSSv3.1: 3.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-19421
CWE-ID:
CWE-434 - Unrestricted Upload of File with Dangerous Type
Exploit availability: No
DescriptionThe vulnerability allows a remote privileged user to read and manipulate data.
In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but Internet Explorer render HTML elements in a .eml file, because of admin/upload-uploadify.php, and validate_safe_file in admin/inc/security_functions.php.
MitigationInstall update from vendor's website.
Vulnerable software versionsGetSimple CMS: 3.3.15
External linkshttp://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Cross-site scripting
EUVDB-ID: #VU36601
Risk: Low
CVSSv3.1: 4.4 [AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:U/RL:U/RC:C]
CVE-ID: CVE-2018-17835
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can permanently inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsGetSimple CMS: 3.3.15
External linkshttp://github.com/GetSimpleCMS/GetSimpleCMS/issues/1298
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
