Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-21580

Quick assessment

Affected
Atlassian Confluence Data Center
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Atlassian Confluence Data Center是澳大利亚Atlassian公司的一款企业级文档协作与内容管理平台。 Atlassian Confluence Data Center 7.19.27至7.19.30版本、8.5.15至8.5.31版本、8.9.6至8.9.8版本、9.0.3版本、9.1.0至9.1.1版本、9.2.0至9.2.20版本、9.3.1至9.3.2版本、9.4.0至9.4.1版本、9.5.1至9.5.4版本、10.0.2至10.0.3版本、10.1.0至10.1.

CVSS 8.6 · High EPSS 0.40% · P33

Affected Version Matrix 16

VendorProduct Version RangeStatus
Atlassian Confluence Data Center 10.2.0 to 10.2.11 affected
10.1.0 to 10.1.2 affected
10.0.2 to 10.0.3 affected
9.5.1 to 9.5.4 affected
9.4.0 to 9.4.1 affected
9.3.1 to 9.3.2 affected
9.2.0 to 9.2.20 affected
9.1.0 to 9.1.1 affected
… +6 more rows
Atlassian Confluence Server 8.5.15 to 8.5.31 affected
7.19.27 to 7.19.30 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-21580

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This Critical severity Stored XSS, PrivEsc (Privilege Escalation), and Security Misconfiguration vulnerability was introduced in versions 7.1.1, 7.4.0, 7.13.0, 7.17.0, 7.19.0, 8.0.0, 8.5.0, 8.9.0, 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 and Server. This Stored XSS, PrivEsc (Privilege Escalation), and Security Misconfiguration vulnerability, with a CVSS Score of 8.6, allows an unauthenticated attacker to execute arbitrary HTML or JavaScript code on a victims browser, perform actions as a higher-privileged user, and to get into the system utilizing loopholes exposed from security best-practices being overlooked. 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: Confluence Data Center and Server 9.2: Upgrade to a release greater than or equal to 9.2.21 Confluence Data Center and Server 10.2: Upgrade to a release greater than or equal to 10.2.13 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Atlassian Confluence Data Center 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Atlassian Confluence Data Center是澳大利亚Atlassian公司的一款企业级文档协作与内容管理平台。 Atlassian Confluence Data Center 7.19.27至7.19.30版本、8.5.15至8.5.31版本、8.9.6至8.9.8版本、9.0.3版本、9.1.0至9.1.1版本、9.2.0至9.2.20版本、9.3.1至9.3.2版本、9.4.0至9.4.1版本、9.5.1至9.5.4版本、10.0.2至10.0.3版本、10.1.0至10.1.
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Atlassian Confluence Data Center 10.2.0 to 10.2.11 -
Atlassian Confluence Server 8.5.15 to 8.5.31 -

II. Public POCs for CVE-2026-21580

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-21580

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-21580 (1)

Vendor Pages for CVE-2026-21580 (1)

Same Patch Batch · Atlassian · 2026-08-18 · 3 CVEs total

CVE-2026-21582 8.8 HIGH Atlassian Crowd Data Center 安全漏洞
CVE-2026-21584 7.6 HIGH Atlassian Bamboo Data Center 安全漏洞

IV. Related Vulnerabilities

Same product: Confluence Data Center
Same vendor: Atlassian

V. Comments for CVE-2026-21580

No comments yet

Leave a comment