CVE-2026-21582

Published: Aug 18, 2026Updated: Aug 26, 2026 Sources: CVE List NVDCWE-287

N/ACVSS

NVD MITRE

EPSS Score

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.

No summary for this CVE yet.

Weaknesses

CWE-287

Affected Products

Atlassian

commercial·AUaka atlassian jira

Crowd Data CenterOn-premWeb App

Enterprise Software

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768

confluence.atlassian.com

https://jira.atlassian.com/browse/CWD-6562

jira.atlassian.com

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