CVE-2021-33959 - Vulnerability Details - OpenCVE

Plex media server 1.21 and before is vulnerable to ddos reflection attack via plex service.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.17625.

Exploitation poc

Automatable yes

Technical Impact partial

Vendors	Products
Plex	Media Server

Configuration 1 [-]

cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/lixiang957/CVE-2021-33959
https://www.freebuf.com/articles/web/260338.html

History

Fri, 04 Apr 2025 18:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2023-01-18T00:00:00.000Z

Updated: 2025-04-04T17:31:14.663Z

Reserved: 2021-06-07T00:00:00.000Z

Link: CVE-2021-33959

Vulnrichment

Updated: 2024-08-04T00:05:52.145Z

NVD

Status : Modified

Published: 2023-01-18T14:15:10.707

Modified: 2025-04-04T18:15:41.477

Link: CVE-2021-33959

Redhat

No data.

OpenCVE Enrichment

No data.

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "3DE6694F-26EB-4DC3-913B-55C65F7DCF91", "versionEndIncluding": "1.21", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Plex media server 1.21 and before is vulnerable to ddos reflection attack via plex service."}, {"lang": "es", "value": "Plex Media Server en las versiones 1.21 y anteriores es vulnerable a un ataque DDos de reflexi\u00f3n a trav\u00e9s del servicio plex. "}], "id": "CVE-2021-33959", "lastModified": "2025-04-04T18:15:41.477", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2023-01-18T14:15:10.707", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/lixiang957/CVE-2021-33959"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "url": "https://www.freebuf.com/articles/web/260338.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/lixiang957/CVE-2021-33959"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "url": "https://www.freebuf.com/articles/web/260338.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-346"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}