Deserialization of Untrusted Data in Sitecore XP - CVE-2021-42237
Published: November 15, 2021 / Updated: April 14, 2022
Vulnerability identifier: #VU58122
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-42237
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in the Report.ashx file. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Sitecore XP
How to mitigate CVE-2021-42237
Install updates from vendor's website.
Sitecore XP - addressed in versions 7.5 Update-2, 8.0 Update-7, 8.1 Update-3, 8.2 Update-7