What is the CVSS score of CVE-2021-47778?

CVE-2021-47778 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.1%.

Which versions of PHP are affected by CVE-2021-47778?

Organizations using GetSimple CMS My SMTP Contact Plugin 1.1.2 face moderate risk from CVE-2021-47778, a code injection vulnerability rated CVSS 7.2.

Is there a public PoC exploit available for CVE-2021-47778?

Yes, a public proof-of-concept exploit is available for CVE-2021-47778. Prioritise patching immediately. EPSS: 1.1%.

How to fix or mitigate CVE-2021-47778?

Within 7 days: Identify all affected systems running 1.1.2 contains a PHP code injection vulnerability. An authen and apply vendor patches promptly. Validate that input sanitization is in place for all user-controlled parameters.

PHP CVE-2021-47778

HIGH

Code Injection (CWE-94)

2026-01-21 disclosure@vulncheck.com

PHP RCE Code Injection Getsimplecms

7.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.2 HIGH

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Mar 06, 2026 - 20:15 vuln.today

Public exploit code

CVE Published

Jan 21, 2026 - 18:16 nvd

HIGH 7.2

DescriptionCVE.org

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.

AnalysisAI

Technical ContextAI

Classified as CWE-94 (Code Injection). Affects the plugin configuration component of Getsimplecms. 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.

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

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CVE-2021-47778 vulnerability details – vuln.today

Back

PHP CVE-2021-47778

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code