Jenkins Enterprise and Operations Center < / / Multiple Vulnerabilities (CloudBees Security Advisory 2021-06-30)

high Nessus Plugin ID 153977


A job scheduling and management system hosted on the remote web server is affected by multiple vulnerabilities.


The version of Jenkins Enterprise or Jenkins Operations Center running on the remote web server is 2.x prior to, 2.249.x prior to, or 2.277.x prior to It is, therefore, affected by multiple vulnerabilities:

- Vulnerable versions of Jenkins allow users to cancel queue items and abort builds of jobs for which they have Item/Cancel permission even when they do not have Item/Read permission. (CVE-2021-21670)

- Vulnerable versions of Jenkins do not invalidate the previous session on login and is, therefore, vulnerable to session fixation attacks. (CVE-2021-21671)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade Jenkins Enterprise or Jenkins Operations Center to version,, or later.

See Also

Plugin Details

Severity: High

ID: 153977

File Name: cloudbees_security_advisory_2021-06-30.nasl

Version: 1.3

Type: combined

Agent: windows, macosx, unix

Family: CGI abuses

Published: 10/11/2021

Updated: 4/11/2022

Configuration: Enable thorough checks

Supported Sensors: Nessus Agent

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 5.1

Temporal Score: 3.8

Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2021-21671


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cloudbees:jenkins

Required KB Items: installed_sw/Jenkins

Exploit Ease: No known exploits are available

Patch Publication Date: 6/30/2021

Vulnerability Publication Date: 6/30/2021

Reference Information

CVE: CVE-2021-21670, CVE-2021-21671