CVE-2021-27852 Checkbox Survey Deserialization of Untrusted Data
An unauthenticated remote attacker can execute arbitrary code via unsafe deserialization in Checkbox Survey.
- Exploited in the wild
- Since 11 Apr 2022
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27852?
CVE-2021-27852 is a critical unsafe deserialization vulnerability in Checkbox Survey, published on 27 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. This issue affects: Checkbox Survey versions prior to 7.
Weakness: CWE-502
Which versions are affected by CVE-2021-27852?
It affects 1 product.
Products include Checkbox Survey.
How do I fix CVE-2021-27852?
No fix has been published for CVE-2021-27852 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 2 May 2022.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2021-27852 being exploited?
Yes. Attackers have exploited CVE-2021-27852 in the wild since at least 11 Apr 2022.
Sources
Also known as GHSA-xrx4-vq84-23w6.