{"id":"CVE-2026-96654","published":"2026-09-23T17:17:23Z","modified":"2026-10-21T13:09:37Z","title":"Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Vulnerability","vendor":"Plex","product":"Media Server","tier":"core","eol":null,"description":{"text":"Plex Media Server before 1.43.3.10861 does not correctly neutralize URL values included in 'searchOne,' allowing an attacker to call other plugins' functions and supply their own parameters.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an improper neutralization of URL values in the 'searchOne' handling of Plex Media Server before 1.43.3.10861, which lives in the server's web page component. An attacker who can reach the server over the network, without authentication or user interaction, can invoke functions of other plugins and supply their own parameters to them.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:15:04Z"},"cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.01949,"percentile":0.80195,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-10-20","dueDate":"2026-10-23","ransomware":false,"requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","notes":"https://forums.plex.tv/t/important-security-update-for-plex-media-server-v1-43-2-and-earlier/942319 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-96654","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-10-18","exploitedFirstSeen":"2026-10-18","ransomware":false,"evidence":[{"url":"https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html","date":"2026-10-18"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-10-20"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":{"pulseCount":11,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Plex vulnerabilities being exploited in the wild to drop a cryptominer","url":"https://otx.alienvault.com/pulse/6ae28367e4148ac8133ccf7a","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Plex vulnerabilities being exploited in the wild to drop a cryptominer","url":"https://otx.alienvault.com/pulse/6ad5b2c95417d4d1ac959070","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-84","name":"Improper Neutralization of Encoded URI Schemes in a Web Page"}],"references":[{"url":"https://forums.plex.tv/t/plex-media-server/30447/711","tags":["Release Notes"]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json","tags":["Third Party Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-96654","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://zmain.info/blog/plex2shell","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96654","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Network-exploitable unauthenticated web request handling flaw","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Plex Media Server before 1.43.3.10861 does not correctly neutralize URL values","start":0,"end":78}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Invokes plugin functions with attacker-controlled parameters","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allowing an attacker to call other plugins' functions and supply their own parameters","start":104,"end":189}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-85368","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85368","exploited":true,"exploitedSince":"2026-10-20","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2026-09-23","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96654","provenance":"source"},{"date":"2026-10-18","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html","provenance":"source"},{"date":"2026-10-20","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-10-20","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85368","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":27},"priority":{"score":68.0,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":10.0,"detail":"added 13 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":16.04,"detail":"percentile 0.8020"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":2.45,"detail":"11 pulses"},{"name":"CVSS severity","points":4.55,"detail":"base score 6.5"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}