CVE-2021-27852: Checkbox Survey Deserialization of Untrusted Data Vulnerability
CVE-2021-27852 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-04-11
A deserialization of untrusted data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. The issue affects versions prior to 7, which are considered end-of-life.
Quick answers
Is CVE-2021-27852 exploited in the wild?
Yes. CVE-2021-27852 is known to be exploited in the wild, first recorded on 11 April 2022. Treat it as urgent.
How severe is CVE-2021-27852?
Critical severity, with a CVSS score of 9.8, published 11 April 2022.
Which products and versions are affected?
Checkbox Survey versions prior to 7.
Is there a fix for CVE-2021-27852?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-27852 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2021-27852?
Check whether you run Checkbox Survey. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Checkbox Survey versions prior to 7
Timeline
2021-05-27: disclosed: NVD Published Date
2022-04-11: kev added: Added to CISA Known Exploited Vulnerabilities Catalog