Is CVE-2024-21686 actively exploited?

No active exploitation of CVE-2024-21686 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-21686 be exploited remotely?

Yes. CVE-2024-21686 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-21686?

CVE-2024-21686 has a CVSS score of 8.7 (HIGH).

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HIGH

CVE-2024-21686

CWE-79Published: July 16, 2024· Updated: Jun 17, 2026

8.7

CVSS v3.1

Official Description

This High severity Stored XSS vulnerability was introduced in versions 7.13 of Confluence Data Center and Server.

This Stored XSS vulnerability, with a CVSS Score of 7.3, allows an authenticated attacker to execute arbitrary HTML or JavaScript code on a victims browser which has high impact to confidentiality, high impact to integrity, no impact to availability, and requires user interaction.

Atlassian recommends that Confluence Data Center and Server customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions listed on this CVE

See the release notes (https://confluence.atlassian.com/doc/confluence-release-notes-327.html). You can download the latest version of Confluence Data Center and Server from the download center (https://www.atlassian.com/software/confluence/download-archives).

This vulnerability was reported via our Bug Bounty program.

NVD Source

Technical Analysis

CVE-2024-21686 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.7.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.