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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
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| Atlassian | Crowd Data Center | affected |
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OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.
| Vendors | Products |
|---|---|
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Atlassian
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Crowd Data Center
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No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 19 Aug 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Atlassian
Atlassian crowd Data Center |
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| Vendors & Products |
Atlassian
Atlassian crowd Data Center |
Wed, 19 Aug 2026 10:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Unauthenticated User Impersonation in Atlassian Crowd Data Center | |
| Weaknesses | CWE-287 |
Tue, 18 Aug 2026 22:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| References |
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| Metrics |
cvssV4_0
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Projects
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MITRE
Status: PUBLISHED
Assigner: atlassian
Published:
Updated: 2026-08-18T22:00:00.412Z
Reserved: 2026-01-01T00:00:40.721Z
Link: CVE-2026-21582
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-18T22:16:50.340
Modified: 2026-08-18T22:16:50.340
Link: CVE-2026-21582
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-08-19T13:30:04Z