Vulnerable component: Jenkins
CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-ID: CWE-90 - Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to the flaw in the remoting module when handling malicious objects. A remote attacker can transfer a specially crafted serialized Java object to the Jenkins CLI, make Jenkins connect to an attacker-controlled LDAP server, bypass existing protection mechanisms and execute arbitrary code on vulnerable system.
Successful exploitation of the vulnerability results in arbitrary code excution on the vulnerable system.
Note: the vulnerability was being actively exploited.