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DETECTION OVERVIEW

Atlassian Confluence Exploit - CVE-2021-26084

Risk Factors

Vulnerable Atlassian Confluence instances are being actively attacked. Simple exploit code is publicly available for this remote code execution (RCE) vulnerability. An unauthenticated attacker could gain complete control of a device, steal sensitive information, or launch additional attacks on the network.

Category

Exploitation
Detection diagram
Next in Exploitation: Atlassian Confluence Exploit - CVE-2022-26134

Attack Background

Object-Graph Navigation Language (OGNL) is an expression language for setting Java object properties in web applications. Atlassian Confluence Server and Data Center is a wiki tool with an OGNL injection vulnerability that allows an unauthenticated attacker to run arbitrary code on a server hosting Atlassian Confluence. An attacker creates an HTTP POST request that delivers malicious OGNL code to a web form. The malicious code runs on the server and the attacker can gain access to the server.

Mitigation Options

Upgrade to the latest version of Atlassian Confluence, 7.13.0

MITRE ATT&CK ID

Associated content

Announcing The Forrester Wave™: Network Analysis And Visibility Solutions, Q4 2025

Network analysis and visibility solutions remain underrepresented in enterprises. Find out why in this preview of a new Wave report.

Report

ExtraHop® Named a Leader in First-Ever Gartner® Magic Quadrant™ for Network Detection and Response — ExtraHop

ExtraHop® Named a Leader in First-Ever Gartner® Magic Quadrant™ for Network Detection and Response

News

Detections

Visit this resource for more information.

Docs

The 2025 ExtraHop Global Threat Landscape Report: The Alarming Reality of Threat Actor Dwell Time and Deeper Network Access — ExtraHop

This analysis exposes the critical link between an organization's lack of internal visibility and the escalating cost of compromise, demanding an urgent re-evaluation of how core business assets are protected.

Blog

ExtraHop RevealX MITRE ATT&CK Coverage 2024 — ExtraHop

Learn why you need to be wary of the claims certain network detection and response providers make about their coverage against the MITRE ATT&CK framework.

Blog

MITRE ATT&CK - Network Detection & Response with RevealX — ExtraHop

Learn how NDR from RevealX helps security teams detect and investigate more adversary TTPs in the MITRE ATT&CK framework than rule-based tools.

External
Periodic Table of Use Cases

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