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Vulnerability record · CVE-2020-5742 · published 15 June 2020

CVE-2020-5742: Plex media server vulnerability

Plex · Media Server

Improper Access Control in Plex Media Server prior to June 15, 2020 allows any origin to execute cross-origin application requests.

8.8 CVSS 3.1 High EPSS 1.5% · top 26.3%
8.8CVSS 3.1 base score, v2 6.8
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Improper Access Control in Plex Media Server prior to June 15, 2020 allows any origin to execute cross-origin application requests.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.tenable.com/security/research/tra-2020-35 ExploitThird Party Advisory
https://www.tenable.com/security/research/tra-2020-35 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.6CVE-2026-96656Plex media server vulnerabilityPlex Media Server before 1.43.3.10861 allows an admin user to write arbitrary files that may be executed on load. The preference TranscoderH264Option…KEVEPSS 1.8%7.2CVE-2020-5741Plex Media Server Windows deserialization leads to Python code executionPlex Media Server on Windows deserializes untrusted data, allowing a remote, authenticated attacker to execute arbitrary Python code. The flaw is a C…KEVEPSS 73%analysed6.9CVE-2026-96654Plex media server vulnerabilityPlex Media Server before 1.43.3.10861 does not correctly neutralize URL values included in 'searchOne,' allowing an attacker to call other plugins' f…KEVEPSS 1.9%5.3CVE-2026-96652Plex media server server-side request forgery (ssrf) vulnerabilityPlex Media Server before 1.43.3.10861 allows SSRF via '/player/timeline'. An attacker using any X-Plex-Token value can include a full URL in the 'pro…KEVEPSS 12%5.3CVE-2026-96655Plex media server server-side request forgery (ssrf) vulnerabilityPlex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/un…KEVEPSS 11%9.8CVE-2018-13415Plex media server xml external entity (xxe) vulnerabilityIn Plex Media Server 1.13.2.5154, the XML parsing engine for SSDP/UPnP functionality is vulnerable to an XML External Entity Processing (XXE) attack.…EPSS 31%8.8CVE-2019-19141Plex media server path traversal vulnerabilityThe Camera Upload functionality in Plex Media Server through 1.18.2.2029 allows remote authenticated users to write files anywhere the user account r…EPSS 4.7%7.8CVE-2020-5740Plex media server uncontrolled search path element vulnerabilityImproper Input Validation in Plex Media Server on Windows allows a local, unauthenticated attacker to execute arbitrary Python code with SYSTEM privi…EPSS 0.75%

Source: NIST National Vulnerability Database (record CVE-2020-5742), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.