Evolution CMS 3.1.6 /manager/index.php post code injection

Summaryinfo

A vulnerability was found in Evolution CMS 3.1.6. It has been rated as critical. Affected by this issue is some unknown functionality of the file /manager/index.php. The manipulation of the argument post leads to code injection. This vulnerability is referenced as CVE-2021-47939. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Evolution CMS 3.1.6. This issue affects an unknown function of the file /manager/index.php. The manipulation of the argument post with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Evolution CMS 3.1.6 contains a remote code execution vulnerability that allows authenticated users with module creation permissions to execute arbitrary system commands by injecting PHP code into module parameters. Attackers can send POST requests to /manager/index.php with malicious PHP code in the 'post' parameter to create modules that execute arbitrary commands when invoked.

The weakness was published by Halit Akaydin as 50296. It is possible to read the advisory at exploit-db.com. The identification of this vulnerability is CVE-2021-47939 since 02/01/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. By approaching the search of inurl:manager/index.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (50296). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• Evolution

Name

• CMS

Version

• 3.1.6

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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