{"id":"CVE-2021-42835","aliases":["EUVD-2021-29791","GHSA-724p-rm8h-wjx7"],"status":"published","title":"An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a...","description":"An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a foothold in a endpoint via a low-privileged user account) can access the exposed RPC service of the update service component. This RPC functionality allows the attacker to interact with the RPC functionality and execute code from a path of his choice (local, or remote via SMB) because of a TOCTOU race condition. This code execution is in the context of the Plex update service (which runs as SYSTEM).","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01185,"percentile":0.68043,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-367"],"published":"2021-12-08T14:34:35Z","modified":"2026-06-17T04:10:10Z","exploits":[{"source":"pocgithub","id":"netanelc305/PlEXcalaison","title":"netanelc305/PlEXcalaison","date":"2021-12-02","url":"https://github.com/netanelc305/PlEXcalaison"}],"products":[{"vendor":"plex","product":"media_server"}],"references":[{"url":"https://www.plex.tv/media-server-downloads/","tags":["x_refsource_MISC","x_transferred","Product","Vendor Advisory"]},{"url":"https://bugsec.com/experts_teams/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://ir-on.io/2021/12/02/local-privilege-plexcalation/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://forums.plex.tv/t/security-regarding-cve-2021-42835/761510","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42835"},{"url":"https://github.com/advisories/GHSA-724p-rm8h-wjx7"}],"sources":{"cve":[{"id":"CVE-2021-42835","description":"An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a foothold in a endpoint via a low-privileged user account) can access the exposed RPC service of the update service component. This RPC functionality allows the attacker to interact with the RPC functionality and execute code from a path of his choice (local, or remote via SMB) because of a TOCTOU race condition. This code execution is in the context of the Plex update service (which runs as SYSTEM).","status":"published","published":"2021-12-08T14:34:35Z","modified":"2024-08-04T03:38:50.21Z","updated_at":"2026-11-02T14:32:58.359368Z"}],"euvd":[{"id":"EUVD-2021-29791","description":"An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a foothold in a endpoint via a low-privileged user account) can access the exposed RPC service of the update service component. This RPC functionality allows the attacker to interact with the RPC functionality and execute code from a path of his choice (local, or remote via SMB) because of a TOCTOU race condition. This code execution is in the context of the Plex update service (which runs as SYSTEM).","status":"published","published":"2021-12-08T14:34:35Z","modified":"2024-08-04T03:38:50Z","updated_at":"2026-11-03T03:24:15.299027Z"}],"ghsa":[{"id":"GHSA-724p-rm8h-wjx7","title":"An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a...","description":"An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a foothold in a endpoint via a low-privileged user account) can access the exposed RPC service of the update service component. This RPC functionality allows the attacker to interact with the RPC functionality and execute code from a path of his choice (local, or remote via SMB) because of a TOCTOU race condition. This code execution is in the context of the Plex update service (which runs as SYSTEM).","status":"published","published":"2021-12-09T00:00:41Z","modified":"2023-02-01T05:06:47Z","cwes":["CWE-367"],"updated_at":"2026-11-02T14:50:25.046492Z"}],"nvd":[{"id":"CVE-2021-42835","description":"An issue was discovered in Plex Media Server through 1.24.4.5081-e362dc1ee. An attacker (with a foothold in a endpoint via a low-privileged user account) can access the exposed RPC service of the update service component. This RPC functionality allows the attacker to interact with the RPC functionality and execute code from a path of his choice (local, or remote via SMB) because of a TOCTOU race condition. This code execution is in the context of the Plex update service (which runs as SYSTEM).","status":"published","published":"2021-12-08T15:15:10.18Z","modified":"2026-06-17T04:10:10.88Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.9,"vector":"AV:L/AC:M/Au:N/C:C/I:C/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}