ValidFormBuilder 4.5.4 File System unserialize System Command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in ValidFormBuilder 4.5.4 and classified as critical. This issue affects the function unserialize of the component File System. The manipulation as part of a System Command leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

ValidFormBuilder version 4.5.4 contains a PHP Object Injection vulnerability in Valid Form unserialize method that can result in Possible to execute unauthorised system commands remotely and disclose file contents in file system.

The bug was discovered 02/09/2018. The weakness was shared 02/09/2018 (GitHub Repository). It is possible to read the advisory at The identification of this vulnerability is CVE-2018-1000059 since 02/09/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

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



CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.3

VulDB Base Score: 7.3
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Injection
CWE: CWE-74 / CWE-707
ATT&CK: T1055

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


02/09/2018 🔍
02/09/2018 +0 days 🔍
02/09/2018 +0 days 🔍
02/09/2018 +0 days 🔍
02/10/2018 +1 days 🔍
02/06/2023 +1822 days 🔍


Advisory: 126
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-1000059 (🔍)


Created: 02/10/2018 09:26 AM
Updated: 02/06/2023 11:10 AM
Changes: 02/10/2018 09:26 AM (56), 01/03/2020 04:23 PM (2), 02/06/2023 11:10 AM (4)
Complete: 🔍


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