CVE-2026-21582CWE-287

CVE-2026-21582

published August 19, 2026

CVSS
8.8
EPSS
0%
Percentile
39.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.8 · NONE
CVSS v4.0
8.8 · 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
EPSS
0.00462 · 39.1th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-08-19T02:16Z
References (2)
https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768 · [email protected]https://jira.atlassian.com/browse/CWD-6562 · [email protected]
EPSS history
Timeline
  • 18 AUG 22:00Z
    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
    cvelistv5