CVE-2020-37186

CriticalPublic PoCRCE

Published: 11 February 2026

Published

11 February 2026

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0014 33.2th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2020-37186 is a critical-severity Code Injection (CWE-94) vulnerability in Chevereto (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 33.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Requires validation and sanitization of the database table prefix parameter to directly prevent malicious code injection during the installation process.

SI-9 Information Input Restrictions good match

prevent

Enforces restrictions on information inputs like the table prefix to prohibit malicious payloads that could create PHP shell files.

SI-2 Flaw Remediation good match

prevent

Mandates timely flaw remediation by applying patches to fix the RCE vulnerability in Chevereto's database configuration installation.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1505.003 Web Shell Persistence

Adversaries may backdoor web servers with web shells to establish persistent access to systems.

attack.mitre.org →

Why these techniques?

The vulnerability is a public-facing web application RCE (T1190) that allows unauthenticated attackers to write a PHP web shell to disk (T1100), enabling arbitrary command execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

Chevereto 3.13.4 Core contains a remote code execution vulnerability that allows attackers to inject malicious code during database configuration installation. Attackers can manipulate the database table prefix parameter to write a PHP shell file and execute arbitrary system commands through…

a crafted POST request.

Deeper analysisAI

CVE-2020-37186, published on 2026-02-11, is a remote code execution vulnerability (CWE-94) affecting Chevereto 3.13.4 Core, with a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). The flaw occurs during the database configuration installation process, where attackers can manipulate the database table prefix parameter in a crafted POST request to inject malicious code, resulting in the creation of a PHP shell file.

Remote attackers require no privileges, authentication, or user interaction to exploit this vulnerability over the network with low complexity. Successful exploitation allows attackers to execute arbitrary system commands on the target server, potentially leading to full compromise including high confidentiality, integrity, and availability impacts.

Advisories and patches are referenced across provided sources, including the official Chevereto website, GitHub releases for Chevereto-Free, an Exploit-DB entry (47903) detailing a public proof-of-concept, and a Vulncheck advisory on the Chevereto Core remote code execution issue. Security practitioners should consult these for mitigation steps, such as applying updated releases.