{"id":"CVE-2021-33831","aliases":["EUVD-2021-20505","GHSA-5mj3-rrxf-hqrv"],"status":"published","title":"api/account/register in the TH Wildau COVID-19 Contact Tracing application through 2021-09-01 has...","description":"api/account/register in the TH Wildau COVID-19 Contact Tracing application through 2021-09-01 has Incorrect Access Control. An attacker can interfere with tracing of infection chains by creating 500 random users within 2500 seconds.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.02016,"percentile":0.81198,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-287","CWE-770"],"published":"2021-09-07T05:09:31Z","modified":"2026-06-17T03:55:17Z","exploits":[{"source":"pocgithub","id":"lanmarc77/CVE-2021-33831","title":"lanmarc77/CVE-2021-33831","date":"2021-08-22","url":"https://github.com/lanmarc77/CVE-2021-33831"}],"products":[{"vendor":"th-wildau","product":"covid-19_contact_tracing"}],"references":[{"url":"https://www.th-wildau.de/studieren-weiterbilden/neuigkeiten-und-veranstaltungen/corona/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://github.com/lanmarc77/CVE-2021-33831","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33831"},{"url":"https://github.com/advisories/GHSA-5mj3-rrxf-hqrv"}],"sources":{"cve":[{"id":"CVE-2021-33831","description":"api/account/register in the TH Wildau COVID-19 Contact Tracing application through 2021-09-01 has Incorrect Access Control. An attacker can interfere with tracing of infection chains by creating 500 random users within 2500 seconds.","status":"published","published":"2021-09-07T05:09:31Z","modified":"2024-08-03T23:58:23.172Z","updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20505","description":"api/account/register in the TH Wildau COVID-19 Contact Tracing application through 2021-09-01 has Incorrect Access Control. An attacker can interfere with tracing of infection chains by creating 500 random users within 2500 seconds.","status":"published","published":"2021-09-07T05:09:31Z","modified":"2024-08-03T23:58:23Z","updated_at":"2026-11-03T03:24:33.318275Z"}],"ghsa":[{"id":"GHSA-5mj3-rrxf-hqrv","title":"api/account/register in the TH Wildau COVID-19 Contact Tracing application through 2021-09-01 has...","description":"api/account/register in the TH Wildau COVID-19 Contact Tracing application through 2021-09-01 has Incorrect Access Control. An attacker can interfere with tracing of infection chains by creating 500 random users within 2500 seconds.","status":"published","published":"2022-05-24T19:13:17Z","modified":"2023-01-27T05:03:21Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:42:13.826528Z"}],"nvd":[{"id":"CVE-2021-33831","description":"api/account/register in the TH Wildau COVID-19 Contact Tracing application through 2021-09-01 has Incorrect Access Control. An attacker can interfere with tracing of infection chains by creating 500 random users within 2500 seconds.","status":"published","published":"2021-09-07T06:15:07.713Z","modified":"2026-06-17T03:55:17.027Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:06:58.05696Z"}]}}