HOMEVULNERABILITIESCVE-2021-47778
HIGH

CVE-2021-47778

CWE-94Published: January 21, 2026· Updated: Jun 17, 2026

7.2
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-47778 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

get-simple1 product(s)
getsimplecms
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/boku7/gsSMTP-Csrf2Xss2RCE/
ADVISORYhttps://www.exploit-db.com/exploits/49774
ADVISORYhttps://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-php-code-injection

All References (5)

→
http://get-simple.infoProduct
→
https://github.com/GetSimpleCMS/GetSimpleCMSProduct
→
https://github.com/boku7/gsSMTP-Csrf2Xss2RCE/Exploit · Third Party Advisory
→
https://www.exploit-db.com/exploits/49774Exploit · Third Party Advisory · VDB Entry
→
https://www.vulncheck.com/advisories/getsimple-cms-my-smtp-contact-plugin-php-code-injectionThird Party Advisory

Quick Facts

CVE IDCVE-2021-47778
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-94
CISA KEVNo
Affected1 vendor(s)
PublishedJan 21, 2026

Related CVEs (CWE-94)

CVE-2008-0235
10.0
CVE-2008-3737
10.0
CVE-2014-6433
10.0
CVE-2007-5351
10.0
CVE-2008-3335
10.0
CVE-2008-3882
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-47778 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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