Code Injection in Discourse - CVE-2021-41163
Published: October 26, 2021
Vulnerability identifier: #VU57639
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-2021-41163
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation in the "subscribe_url" parameter. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Discourse
How to mitigate CVE-2021-41163
Install updates from vendor's website.
Discourse - addressed in versions 2.7.9, 2.8.0 beta7