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CVE-2026-21582

Quick assessment

Affected
Atlassian Crowd 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 Crowd Data Center是澳大利亚Atlassian公司的一款身份认证与权限管理软件。 Atlassian Crowd Data Center 7.2.1版本存在安全漏洞，该漏洞源于身份验证和会话管理不当，可能导致未经身份验证的攻击者以其他用户身份执行操作。

CVSS 8.8 · High EPSS 0.46% · P38

Affected Version Matrix 2

VendorProduct Version RangeStatus
Atlassian Crowd Data Center 7.2.1 affected
7.2.2 to 7.2.3 unaffected
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I. Basic Information for CVE-2026-21582

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This High severity BASM (Broken Authentication & Session Management) vulnerability known as CVE-2026-21582 was introduced in version 7.2.1 of Crowd Data Center. This BASM (Broken Authentication & Session Management) vulnerability, with a CVSS Score of 8.8, allows an unauthenticated attacker to perform actions as another user. Atlassian recommends that Crowd Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Crowd Data Center 7.2: Upgrade to a release greater than or equal to 7.2.2 See the release notes (https://confluence.atlassian.com/crowd/crowd-release-notes-199094.html). You can download the latest version of Crowd Data Center from the download center (https://www.atlassian.com/software/crowd/download-archive). This vulnerability was reported via our Penetration Testing program.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Atlassian Crowd Data Center 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Atlassian Crowd Data Center是澳大利亚Atlassian公司的一款身份认证与权限管理软件。 Atlassian Crowd Data Center 7.2.1版本存在安全漏洞，该漏洞源于身份验证和会话管理不当，可能导致未经身份验证的攻击者以其他用户身份执行操作。
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 Crowd Data Center 7.2.1 -

II. Public POCs for CVE-2026-21582

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III. Intelligence Information for CVE-2026-21582

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Vendor Advisories for CVE-2026-21582 (2)

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

CVE-2026-21580 8.6 HIGH Atlassian Confluence 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: Crowd Data Center
Same vendor: Atlassian

V. Comments for CVE-2026-21582

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