{"id":"CVE-2021-29488","aliases":["DEBIAN-CVE-2021-29488","EUVD-2021-16087","UBUNTU-CVE-2021-29488"],"status":"published","title":"Creation of files outside the Download Folder through malicious PAR2 files","description":"SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00893,"percentile":0.59735,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-23"],"published":"2021-05-07T15:00:11Z","modified":"2026-10-23T18:03:57Z","fixes":[{"ecosystem":"Debian:12","package":"sabnzbdplus","fixed_in":["3.2.1+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"sabnzbdplus","fixed_in":["3.2.1+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"sabnzbdplus","fixed_in":["3.2.1+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"sabnzbdplus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1+dfsg-1"}]}],"versions":["0.4.11-1","0.4.12-1","0.4.9-1","0.5.0-1","0.5.0-2","0.5.2-1","0.5.3-1","0.5.4-1","0.5.5-1","0.5.6-1","0.6.10-1","0.6.14-1","0.6.15-1","0.6.2-1","0.6.4-1","0.6.6-1","0.6.7-1","0.6.8-1","0.6.9-1","0.7.11-1","0.7.13-1","0.7.16-1","0.7.18-1","0.7.2-1","0.7.20+dfsg-1","0.7.20-1","0.7.3-1","0.7.4-1","0.7.5-1","0.7.6-1","0.7.8-1","0.7.9-1","1.0.2+dfsg-1","1.0.3+dfsg-1","1.0.3+dfsg-2","1.1.1+dfsg-1","2.3.1+dfsg-1","2.3.2+dfsg-1","2.3.4+dfsg-1","2.3.6+dfsg-1","3.0.0~0git20200408+dfsg-1","3.1.1+dfsg-1","3.1.1+dfsg-2"]},{"source":"osv","ecosystem":"Debian:13","package":"sabnzbdplus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1+dfsg-1"}]}],"versions":["0.4.11-1","0.4.12-1","0.4.9-1","0.5.0-1","0.5.0-2","0.5.2-1","0.5.3-1","0.5.4-1","0.5.5-1","0.5.6-1","0.6.10-1","0.6.14-1","0.6.15-1","0.6.2-1","0.6.4-1","0.6.6-1","0.6.7-1","0.6.8-1","0.6.9-1","0.7.11-1","0.7.13-1","0.7.16-1","0.7.18-1","0.7.2-1","0.7.20+dfsg-1","0.7.20-1","0.7.3-1","0.7.4-1","0.7.5-1","0.7.6-1","0.7.8-1","0.7.9-1","1.0.2+dfsg-1","1.0.3+dfsg-1","1.0.3+dfsg-2","1.1.1+dfsg-1","2.3.1+dfsg-1","2.3.2+dfsg-1","2.3.4+dfsg-1","2.3.6+dfsg-1","3.0.0~0git20200408+dfsg-1","3.1.1+dfsg-1","3.1.1+dfsg-2"]},{"source":"osv","ecosystem":"Debian:14","package":"sabnzbdplus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1+dfsg-1"}]}],"versions":["0.4.11-1","0.4.12-1","0.4.9-1","0.5.0-1","0.5.0-2","0.5.2-1","0.5.3-1","0.5.4-1","0.5.5-1","0.5.6-1","0.6.10-1","0.6.14-1","0.6.15-1","0.6.2-1","0.6.4-1","0.6.6-1","0.6.7-1","0.6.8-1","0.6.9-1","0.7.11-1","0.7.13-1","0.7.16-1","0.7.18-1","0.7.2-1","0.7.20+dfsg-1","0.7.20-1","0.7.3-1","0.7.4-1","0.7.5-1","0.7.6-1","0.7.8-1","0.7.9-1","1.0.2+dfsg-1","1.0.3+dfsg-1","1.0.3+dfsg-2","1.1.1+dfsg-1","2.3.1+dfsg-1","2.3.2+dfsg-1","2.3.4+dfsg-1","2.3.6+dfsg-1","3.0.0~0git20200408+dfsg-1","3.1.1+dfsg-1","3.1.1+dfsg-2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"sabnzbdplus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.20-1","0.7.20+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"sabnzbdplus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.1+dfsg-1","2.3.1+dfsg-1","2.3.2+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"sabnzbdplus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.6+dfsg-1","2.3.6+dfsg-1build1","2.3.6+dfsg-1ubuntu1","3.0.0~0git20200408+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"sabnzbdplus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.1+dfsg-1","3.4.2+dfsg-1","3.4.2+dfsg-2","3.5.0+dfsg-1","3.5.0+dfsg-2","3.5.1+dfsg-1"]}],"products":[{"vendor":"sabnzbd","product":"sabnzbd"}],"references":[{"url":"https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-29488","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-29488","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-29488","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-29488","title":"Creation of files outside the Download Folder through malicious PAR2 files","description":"SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.","status":"published","published":"2021-05-07T15:00:11Z","modified":"2024-08-03T22:11:05.402Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-16087","description":"SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.","status":"published","published":"2021-05-07T15:00:11Z","modified":"2024-08-03T22:11:05Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T03:24:44.540278Z"}],"nvd":[{"id":"CVE-2021-29488","description":"SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.","status":"published","published":"2021-05-07T15:15:07.503Z","modified":"2026-06-17T03:47:44.777Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T14:06:52.81233Z"}],"osv":[{"id":"CVE-2021-29488","description":"SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.","status":"published","published":"2021-05-07T15:15:07.503Z","modified":"2026-04-10T04:31:59.789907Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"DEBIAN-CVE-2021-29488","description":"SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.","status":"published","published":"2021-05-07T15:15:07.503Z","modified":"2026-10-23T18:03:57.723001581Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"UBUNTU-CVE-2021-29488","description":"SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.","status":"published","published":"2021-05-07T15:15:00Z","modified":"2025-10-24T04:50:16Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:26.779273Z"}]}}