Code Injection in Confluence Server - CVE-2020-4027
Published: March 16, 2021
Vulnerability identifier: #VU51512
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-4027
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation. A remote user can bypass velocity template injection mitigations via an injection vulnerability in custom user macros and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Confluence Server
How to mitigate CVE-2020-4027
Install updates from vendor's website.
Confluence Server - addressed in versions 7.4.5, 7.5.1