{"id":"CVE-2021-33558","aliases":["EUVD-2021-20250","GHSA-8rj5-wwmx-vj53"],"status":"disputed","title":"Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration...","description":"Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js. NOTE: multiple third parties report that this is a site-specific issue because those files are not part of Boa.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.12307,"percentile":0.9622,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-200"],"published":"2021-05-27T00:00:00Z","modified":"2026-06-17T03:54:47Z","exploits":[{"source":"nuclei","id":"CVE-2021-33558","title":"Boa 0.94.13 - Information Disclosure","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-33558.yaml"},{"source":"pocgithub","id":"anldori/CVE-2021-33558","title":"anldori/CVE-2021-33558","date":"2022-11-28","url":"https://github.com/anldori/CVE-2021-33558"},{"source":"pocgithub","id":"mdanzaruddin/CVE-2021-33558.","title":"mdanzaruddin/CVE-2021-33558.","date":"2021-05-25","url":"https://github.com/mdanzaruddin/CVE-2021-33558."}],"products":[{"vendor":"boa","product":"boa"}],"references":[{"url":"https://sourceforge.net/projects/boa/files/boa/0.94.13/","tags":["x_transferred","Release Notes","Third Party Advisory"]},{"url":"https://github.com/mdanzaruddin/CVE-2021-33558.","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://github.com/mdanzaruddin/CVE-2021-33558./issues/1","tags":["x_transferred","Issue Tracking","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33558"},{"url":"https://sourceforge.net/projects/boa/files/boa/0.94.13"},{"url":"https://github.com/advisories/GHSA-8rj5-wwmx-vj53"}],"sources":{"cve":[{"id":"CVE-2021-33558","description":"Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js. NOTE: multiple third parties report that this is a site-specific issue because those files are not part of Boa.","status":"disputed","published":"2021-05-27T00:00:00Z","modified":"2024-08-03T23:50:43.029Z","updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20250","description":"Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js. NOTE: multiple third parties report that this is a site-specific issue because those files are not part of Boa.","status":"published","published":"2021-05-27T00:00:00Z","modified":"2024-08-03T23:50:43Z","updated_at":"2026-11-03T03:24:33.866739Z"}],"ghsa":[{"id":"GHSA-8rj5-wwmx-vj53","title":"Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration...","description":"Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js.","status":"published","published":"2022-05-24T22:01:38Z","modified":"2024-03-30T05:01:45Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:55:45.190481Z"}],"nvd":[{"id":"CVE-2021-33558","description":"Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js. NOTE: multiple third parties report that this is a site-specific issue because those files are not part of Boa.","status":"disputed","published":"2021-05-27T11:15:07.373Z","modified":"2026-06-17T03:54:47.617Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}