CVE-2024-21686

Name: CVE-2024-21686
Creator: NVD / NIST
Published: 2024-07-16T20:15:02.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2024-21686 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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.. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.7/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS Probability

0.89%

54.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Atlassian	Confluence Data Center	< 7.19.22
Atlassian	Confluence Data Center	>= 7.20.0, < 8.5.9
Atlassian	Confluence Data Center	>= 8.6.0, < 8.9.1
Atlassian	Confluence Server	< 7.19.22
Atlassian	Confluence Server	>= 7.20.0, < 8.5.9

References

https://confluence.atlassian.com/pages/viewpage.action?pageId=1417150917Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-96134Issue Tracking
https://confluence.atlassian.com/pages/viewpage.action?pageId=1417150917Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-96134Issue Tracking

Timeline

Published: Jul 16, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-21686?

How severe is CVE-2024-21686?

CVE-2024-21686 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21686?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-21686?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST