Atlassian Confluence Server Webwork OGNL Injection (CVE-2021-26084)

critical Nessus Plugin ID 153087
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote web server hosts a web application that is affected by an OGNL injection vulnerability.


The remote Atlassian Confluence application running on the remote host is affected by an OGNL injection vulnerability that would allow an unauthenticated user to execute arbitrary code on a Confluence Server or Data Center instance by sending a specially crafted HTTP request.


Upgrade to Atlassian Confluence version 6.13.23, 7.4.11, 7.11.6, 7.12.5 or later.

See Also

Plugin Details

Severity: Critical

ID: 153087

File Name: confluence_cve_2021_26084.nbin

Version: 1.05

Type: remote

Family: CGI abuses

Published: 9/7/2021

Updated: 10/19/2021

Dependencies: confluence_detect.nasl

Risk Information

CVSS Score Source: CVE-2021-26084


Risk Factor: Critical

Score: 9.9


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

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

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

Vulnerability Information

CPE: cpe:/a:atlassian:confluence

Required KB Items: installed_sw/confluence

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/25/2021

Vulnerability Publication Date: 8/25/2021

Exploitable With

Metasploit (Atlassian Confluence WebWork OGNL Injection)

Reference Information

CVE: CVE-2021-26084

IAVA: 2021-A-0397