{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2021-27395 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27395 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27395 is a high-severity missing authorization vulnerability in Siemens SIMATIC Process Historian 2013 and earlier, published on 12 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-27395 and fix it if it is affected.\n\nWhat it is: CVE-2021-27395 is a high-severity missing authorization vulnerability in Siemens SIMATIC Process Historian 2013 and earlier, published on 12 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-27395 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC Process Historian 2013 and earlier. 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-2021-27395/ (Markdown: https://insights.sbomify.com/CVE-2021-27395/index.md)","id":"CVE-2021-27395","markdown":"https://insights.sbomify.com/CVE-2021-27395/index.md","name":"CVE-2021-27395","record":{"aliases":["GHSA-9j28-jmqh-8rph"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["data_modify","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Siemens Process Historian","requires_auth":"low_privilege","summary":"An unauthenticated interface in Siemens SIMATIC Process Historian allows attackers to insert, modify, or delete critical data.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_process_historian_2013","vendor":"siemens"},{"product":"simatic_process_historian_2014","vendor":"siemens"},{"product":"simatic_process_historian_2019","vendor":"siemens"},{"product":"simatic_process_historian_2020","vendor":"siemens"}],"cvss":{"score":8.1,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"A vulnerability has been identified in SIMATIC Process Historian 2013 and earlier (All versions), SIMATIC Process Historian 2014 (All versions \u003c SP3 Update 6), SIMATIC Process Historian 2019 (All versions), SIMATIC Process Historian 2020 (All versions). An interface in the software that is used for critical functionalities lacks authentication, which could allow a malicious user to maliciously insert, modify or delete data.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Missing authorization in SIMATIC Process Historian 2013 and earlier","id":"CVE-2021-27395","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in Tecnomatix Plant Simulation","id":"CVE-2021-27396"},"packages":[],"prev":{"headline":"Privilege escalation in Mendix Applications using Mendix 7","id":"CVE-2021-27394"},"products":["SIMATIC Process Historian 2013 and earlier","SIMATIC Process Historian 2014","SIMATIC Process Historian 2019","SIMATIC Process Historian 2020"],"published":"2021-10-12","related":[],"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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["Siemens"]},"summary":"An unauthenticated interface in Siemens SIMATIC Process Historian allows attackers to insert, modify, or delete critical data.","url":"https://insights.sbomify.com/CVE-2021-27395/"}