CVE-2024-21686: confluence server XSS — Fix

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.

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CVSS v3.1 Score

8.7

HIGH

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

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

Advisories & Patches

https://confluence.atlassian.com/pages/viewpage.action?pageId=1417150917 https://confluence.atlassian.com/pages/viewpage.action?pageId=1417150917

Other References

https://jira.atlassian.com/browse/CONFSERVER-96134 https://jira.atlassian.com/browse/CONFSERVER-96134

Frequently Asked Questions

What is CVE-2024-21686? +

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. It has a CVSS v3.1 base score of 8.7 (HIGH).

How severe is CVE-2024-21686? +

CVE-2024-21686 has a CVSS v3.1 score of 8.7 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-21686? +

CVE-2024-21686 affects products from atlassian, specifically: confluence_data_center, confluence_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-21686? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-21686