{"cve":"CVE-2026-21582","nvd":{"published":"2026-08-18T22:16:50.340","modified":"2026-10-22T17:09:59.477","status":"Awaiting Analysis","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.\r\n\r\nThis BASM (Broken Authentication & Session Management) vulnerability, with a CVSS Score of 8.8, allows an unauthenticated attacker to perform actions as another user.\r\n\t\r\n\tAtlassian 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:\r\n\t\t\r\n\t\tCrowd Data Center 7.2: Upgrade to a release greater than or equal to 7.2.2\r\n\t\t\r\n\t\t\r\n\t\r\n\tSee 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). \r\n\t\r\n\tThis vulnerability was reported via our Penetration Testing program.","cvss_v4":{"vector":"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","score":8.8},"cvss_v3":null,"cwes":["CWE-287"],"references":["https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768","https://jira.atlassian.com/browse/CWD-6562"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-21582","score":0.00462,"percentile":0.39823,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}