Checkbox Survey 6.12 <= 6.18 RCE

critical Nessus Plugin ID 161325


Checkbox Survey is affected by an arbitrary code execution.


Checkbox Survey is an ASP.NET application that can add survey functionality to a website. Prior to version 7.0, Checkbox Survey implements its own View State functionality by accepting a _VSTATE argument, which it then deserializes using LosFormatter. Because this data is manually handled by the Checkbox Survey code, the ASP.NET ViewState Message Authentication Code (MAC) setting on the server is ignored. Without MAC, an attacker can create arbitrary data that will be deserialized, resulting in arbitrary code execution.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Update to Checkbox Survey 7.0 or later

See Also

Plugin Details

Severity: Critical

ID: 161325

File Name: checkbox_survey_cve-2021-27852.nasl

Version: 1.4

Type: combined

Agent: windows

Family: Misc.

Published: 5/18/2022

Updated: 5/24/2022

Supported Sensors: Nessus Agent

Risk Information


Risk Factor: High

Score: 7.4


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:H/RL:OF/RC:C

CVSS Score Source: CVE-2021-27852


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:checkbox:survey

Required KB Items: installed_sw/Checkbox Survey

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/29/2019

Vulnerability Publication Date: 5/25/2021

CISA Known Exploited Dates: 5/2/2022

Reference Information

CVE: CVE-2021-27852