{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-42835 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-42835 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-42835 is a high-severity vulnerability in n/a, published on 8 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-42835 and fix it if it is affected.\n\nWhat it is: CVE-2021-42835 is a high-severity vulnerability in n/a, published on 8 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-42835 in the wild and no public exploit code.\n\nAffected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-42835/ (Markdown: https://insights.sbomify.com/CVE-2021-42835/index.md)","id":"CVE-2021-42835","markdown":"https://insights.sbomify.com/CVE-2021-42835/index.md","name":"CVE-2021-42835","record":{"aliases":["GHSA-724p-rm8h-wjx7"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Plex Media Server","requires_auth":"low_privilege","summary":"A TOCTOU race condition in the update service allows low-privileged attackers to execute arbitrary code as SYSTEM via RPC.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"media_server","vendor":"plex"}],"cvss":{"score":7,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"}],"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).","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-12-02","github_poc":1,"max_poc_stars":6,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-12-02T20:18:08Z","kind":"github_poc","ref":"https://github.com/netanelc305/PlEXcalaison","stars":6,"title":"Plex media server local privilige escalation poc -  CVE-2021-42835"}],"tier":"poc_unverified"},"has_fix":null,"headline":"Race condition in n/a","id":"CVE-2021-42835","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"race_condition","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"Duplicate Advisory: ReDoS via crafted JSON input in GJSON","id":"CVE-2021-42836"},"packages":[],"prev":{"headline":"Use of hardcoded credentials impacting AquaView versions 1.60, 7.x, 8.x","id":"CVE-2021-42833"},"products":["n/a"],"published":"2021-12-08","related":[{"cvss_score":8.6,"headline":"Plex Media Server External Control of File Name or Path","id":"CVE-2026-96656","kev_date_added":"2026-10-20","published":"2026-09-23"},{"cvss_score":7.2,"headline":"Plex Media Server Remote Code Execution","id":"CVE-2020-5741","kev_date_added":"2023-03-10","published":"2020-05-08"},{"cvss_score":6.9,"headline":"Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page","id":"CVE-2026-96654","kev_date_added":"2026-10-20","published":"2026-09-23"},{"cvss_score":5.3,"headline":"Plex Media Server Server-Side Request Forgery (SSRF)","id":"CVE-2026-96652","kev_date_added":"2026-10-20","published":"2026-09-23"},{"cvss_score":5.3,"headline":"Plex Media Server Server-Side Request Forgery (SSRF)","id":"CVE-2026-96655","kev_date_added":"2026-10-20","published":"2026-09-23"},{"cvss_score":9.8,"headline":"XML external entity in n/a","id":"CVE-2018-13415","kev_date_added":null,"published":"2018-08-13"},{"cvss_score":8.8,"headline":"Cross-site request forgery in Plex Media Server","id":"CVE-2020-5742","kev_date_added":null,"published":"2020-06-15"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"A TOCTOU race condition in the update service allows low-privileged attackers to execute arbitrary code as SYSTEM via RPC.","url":"https://insights.sbomify.com/CVE-2021-42835/"}