High severity · published Jan 21, 2026
CVE-2021-47778
GetSimple CMS My SMTP Contact Plugin 1.1.2 - PHP Code Injection
7.2
CVSS
1.3%
EPSS
No
On KEV
Description
GetSimple CMS My SMTP Contact Plugin 1.1.2 contains a PHP code injection vulnerability. An authenticated administrator can inject arbitrary PHP code through plugin configuration parameters, leading to remote code execution on the server.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
My SMTP Contact Plugin · Get-Simple
1.1.2 · source: vendor
GE
Getsimplecms · Get-simple
1.1.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-47778
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-47778
Product
http://get-simple.info
Product
https://github.com/GetSimpleCMS/GetSimpleCMS
Exploit
https://github.com/boku7/gsSMTP-Csrf2Xss2RCE/
Exploit
https://www.exploit-db.com/exploits/49774
Third Party Advisory
https://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-php-code-injection