{"id":"CVE-2021-43448","aliases":["EUVD-2021-30381","GHSA-hq34-fgpx-qmf6"],"status":"published","title":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of...","description":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01031,"percentile":0.64165,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2023-01-23T00:00:00Z","modified":"2026-11-09T02:45:19Z","products":[{"vendor":"onlyoffice","product":"server"}],"references":[{"url":"https://github.com/ONLYOFFICE/server","tags":["x_transferred","Third Party Advisory","advisory"]},{"url":"https://www.onlyoffice.com/","tags":["x_transferred","Product","Vendor Advisory","advisory"]},{"url":"https://labs.nettitude.com/blog/exploiting-onlyoffice-web-sockets-for-unauthenticated-remote-code-execution/","tags":["x_transferred","Exploit","Mitigation","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43448"},{"url":"https://labs.nettitude.com/blog/exploiting-onlyoffice-web-sockets-for-unauthenticated-remote-code-execution"},{"url":"https://www.onlyoffice.com"},{"url":"https://github.com/advisories/GHSA-hq34-fgpx-qmf6"}],"sources":{"cve":[{"id":"CVE-2021-43448","description":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.","status":"published","published":"2023-01-23T00:00:00Z","modified":"2025-04-02T16:00:33.536Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-30381","description":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.","status":"published","published":"2023-01-23T00:00:00Z","modified":"2025-04-02T16:00:33Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T20:52:44.372321Z"}],"ghsa":[{"id":"GHSA-hq34-fgpx-qmf6","title":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of...","description":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.","status":"published","published":"2023-01-23T15:30:33Z","modified":"2025-04-02T18:31:45Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:00:36.145205Z"}],"nvd":[{"id":"CVE-2021-43448","description":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.","status":"published","published":"2023-01-23T15:15:13.45Z","modified":"2026-06-17T04:10:59.083Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:07:07.323379Z"}],"osv":[{"id":"CVE-2021-43448","description":"ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.","status":"published","published":"2023-01-23T15:15:13.45Z","modified":"2026-11-09T02:45:19.84227387Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-09T03:16:44.651171Z"}]}}