{"id":"CVE-2021-25631","aliases":["ALPINE-CVE-2021-25631","EUVD-2021-12527","GHSA-8xj5-7228-hcfg"],"status":"published","title":"denylist of executable filename extensions possible to bypass under windows","description":"In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.05043,"percentile":0.9236,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-184"],"published":"2021-05-03T11:10:33Z","modified":"2026-11-03T06:32:27Z","fixes":[{"ecosystem":"Alpine:v3.15","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"libreoffice","fixed_in":["7.2.2.2-r0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.15","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"libreoffice","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.2.2-r0"}]}]}],"products":[{"vendor":"libreoffice","product":"libreoffice"},{"vendor":"the document foundation","product":"libreoffice"}],"references":[{"url":"https://positive.security/blog/url-open-rce#open-libreoffice","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.libreoffice.org/about-us/security/advisories/cve-2021-25631/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25631"},{"url":"https://github.com/advisories/GHSA-8xj5-7228-hcfg"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-25631","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-25631","title":"denylist of executable filename extensions possible to bypass under windows","description":"In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.","status":"published","published":"2021-05-03T11:10:33.079Z","modified":"2024-09-16T17:08:37.634Z","cwes":["CWE-184"],"updated_at":"2026-11-02T14:32:59.802172Z"}],"euvd":[{"id":"EUVD-2021-12527","description":"In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.","status":"published","published":"2021-05-03T11:10:33Z","modified":"2024-09-16T17:08:37Z","updated_at":"2026-11-03T00:55:44.825687Z"}],"ghsa":[{"id":"GHSA-8xj5-7228-hcfg","title":"In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior...","description":"In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.","status":"published","published":"2022-05-24T17:49:24Z","modified":"2023-01-29T05:06:35Z","updated_at":"2026-11-02T14:46:03.455343Z"}],"nvd":[{"id":"CVE-2021-25631","description":"In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.","status":"published","published":"2021-05-03T12:15:07.417Z","modified":"2026-06-17T03:42:15.093Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-184"],"updated_at":"2026-11-02T14:06:52.81233Z"}],"osv":[{"id":"ALPINE-CVE-2021-25631","description":"In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.","status":"published","published":"2021-05-03T12:15:07.417Z","modified":"2026-11-03T06:32:27.858191375Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T07:17:41.158523Z"}]}}