Detections
Analytics

Atlassian Confluence 9.0.1 / 9.1.x / 9.2.x < 9.2.17 / 9.3.1 / 9.4.x / 9.5.1 / 10.0.2 / 10.1.x / 10.2.x < 10.2.7 (CONFSERVER-104334)

high Nessus Plugin ID 331334

Synopsis

The remote Atlassian Confluence host is missing a security update.

Description

The version of Atlassian Confluence Server running on the remote host is affected by a vulnerability as referenced in the CONFSERVER-104334 advisory.

 - This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center. This DoS (Denial of Service) vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network. (CVE-2026-21577)

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

Solution

Upgrade to Atlassian Confluence version 9.2.17, 10.2.7 or later.

See Also

https://jira.atlassian.com/browse/CONFSERVER-104334

http://www.nessus.org/u?3f7c3b7c

Plugin Details

Severity: High

ID: 331334

File Name: confluence_confserver-104334.nasl

Version: 1.1

Type: Combined

Agent: windows, macosx, unix

Family: CGI abuses

Published: 7/31/2026

Updated: 7/31/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Enable CGI Scanning: true

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

CVSS v2

Risk Factor: Medium

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS Score Source: CVE-2026-21577

CVSS v3

Risk Factor: Medium

Base Score: 6.5

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

CVSS v4

Risk Factor: High

Base Score: 7.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/a:atlassian:confluence

Required KB Items: installed_sw/Atlassian Confluence

Patch Publication Date: 7/8/2026

Vulnerability Publication Date: 7/8/2026

Reference Information

CVE: CVE-2026-21577

IAVA: 2026-A-0762