CVE-2021-47939Public exploitNetwork attack vectorHinoki check available

Authenticated command execution via module parameter injection

Published May 10, 2026 · Updated May 10, 2026

Code injection in Evolution CMS 3.1.6 allows remote authenticated users with module creation permission to execute system commands. The module-save action at /manager/index.php stores attacker-supplied PHP from the post parameter as executable module code without restricting dangerous constructs. An account authorized to create modules is required, and invoking the saved module runs commands with the web server process's privileges.

CVSS severity8.7
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code injection in Evolution CMS 3.1.6 allows remote authenticated users with module creation permission to execute system commands. The module-save action at /manager/index.php stores attacker-supplied PHP from the post parameter as executable module code without restricting dangerous constructs. An account authorized to create modules is required, and invoking the saved module runs commands with the web server process's privileges.

The record

CVE
CVE-2021-47939
Published
May 10, 2026
Updated
May 10, 2026
Vendor
Evolution CMS Project
Product
Evolution CMS
Classifications
CWE-94, T1190, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 10, 2026CVE publishedPublication date reported by the CVE source.
  2. May 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Evolution CMS Project · Evolution CMSversion=3.1.6

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo