{"id":"CVE-2021-32541","aliases":["EUVD-2021-19387","GHSA-549f-vmr8-2vjf"],"status":"published","title":"SysJust CTS Web - Broken Access Control","description":"The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01511,"percentile":0.74675,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2021-05-28T08:10:27Z","modified":"2026-06-17T03:53:08Z","products":[{"vendor":"sysjust","product":"cts web"},{"vendor":"sysjust","product":"cts_web"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32541"},{"url":"https://github.com/advisories/GHSA-549f-vmr8-2vjf"}],"sources":{"cve":[{"id":"CVE-2021-32541","title":"SysJust CTS Web - Broken Access Control","description":"The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services","status":"published","published":"2021-05-28T08:10:27.063Z","modified":"2024-09-17T00:46:15.943Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2021-19387","description":"The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services","status":"published","published":"2021-05-28T08:10:27Z","modified":"2024-09-17T00:46:15Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T00:28:55.842484Z"}],"ghsa":[{"id":"GHSA-549f-vmr8-2vjf","title":"The CTS Web transaction system related to authentication and session management is implemented...","description":"The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services","status":"published","published":"2022-05-24T19:03:39Z","modified":"2023-01-29T05:06:48Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:46:06.412268Z"}],"nvd":[{"id":"CVE-2021-32541","description":"The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services","status":"published","published":"2021-05-28T08:15:07.057Z","modified":"2026-06-17T03:53:08.417Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}