{"answers":{"affected":"3 open source packages ship an affected version, including org.apache.nifi:nifi and nifi. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-13940 in the wild and no public exploit code.","fix":"Upgrade org.apache.nifi:nifi to 1.12.0-RC1 or later.","what":"CVE-2020-13940 is a medium-severity vulnerability in Apache Nifi, published on 1 Oct 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-13940 and fix it if it is affected.\n\nWhat it is: CVE-2020-13940 is a medium-severity vulnerability in Apache Nifi, published on 1 Oct 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2020-13940 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.nifi:nifi (Maven): affected from 1.0.0; fixed in 1.12.0-RC1\n- org.apache.nifi:nifi (Maven): affected from 1.0.0; fixed in 1.12.0-RC1\n- nifi (Bitnami): affected from 1.0.0 up to 1.11.4; no fix listed\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-2020-13940/ (Markdown: https://insights.sbomify.com/CVE-2020-13940/index.md)","id":"CVE-2020-13940","markdown":"https://insights.sbomify.com/CVE-2020-13940/index.md","name":"CVE-2020-13940","record":{"aliases":["BIT-nifi-2020-13940","GHSA-q4xf-3pmq-3hw8"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Apache NiFi","requires_auth":"none","summary":"Trusted administrators can configure malicious XML files in Apache NiFi, enabling XXE attacks that allow external service calls and potential data exposure.","user_interaction":"required","vuln_class":"xxe"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"nifi","vendor":"apache"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-611","name":"Improper Restriction of XML External Entity Reference"}],"description":"In Apache NiFi 1.0.0 to 1.11.4, the notification service manager and various policy authorizer and user group provider objects allowed trusted administrators to inadvertently configure a potentially malicious XML file. The XML file has the ability to make external calls to services (via XXE).","ecosystems":["Bitnami","Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Improper Restriction of XML External Entity Reference in Apache NiFi","id":"CVE-2020-13940","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:nifi","products":["apache:nifi"],"type":"xxe","year":"2020"},"n_packages":3,"n_references":1,"next":{"headline":"Improper Input Validation in Apache Solr","id":"CVE-2020-13941"},"packages":[{"ecosystem":"Bitnami","fixed":[],"introduced":["1.0.0"],"last_affected":["1.11.4"],"package":"nifi","purl":"pkg:bitnami/nifi","source":"BIT-nifi-2020-13940"},{"ecosystem":"Maven","fixed":["1.12.0-RC1"],"introduced":["1.0.0"],"last_affected":[],"package":"org.apache.nifi:nifi","purl":null,"source":"GHSA-q4xf-3pmq-3hw8"},{"ecosystem":"Maven","fixed":["1.12.0-RC1"],"introduced":["1.0.0"],"last_affected":[],"package":"org.apache.nifi:nifi","purl":"pkg:maven/org.apache.nifi/nifi","source":"GHSA-q4xf-3pmq-3hw8"}],"prev":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2020-13939"},"products":["Apache NiFi"],"published":"2020-10-01","related":[{"cvss_score":9.8,"headline":"Improper Restriction of XML External Entity Reference in Apache NiFi","id":"CVE-2018-1309","kev_date_added":null,"published":"2018-05-23"},{"cvss_score":9.8,"headline":"Apache NiFi XSS issue in context path handling","id":"CVE-2017-15697","kev_date_added":null,"published":"2018-01-23"},{"cvss_score":9.8,"headline":"Injection in Apache NiFi","id":"CVE-2017-5636","kev_date_added":null,"published":"2017-10-19"},{"cvss_score":8.8,"headline":"Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests","id":"CVE-2026-68981","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":8.8,"headline":"Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources","id":"CVE-2023-36542","kev_date_added":null,"published":"2023-07-29"},{"cvss_score":8.8,"headline":"Apache NiFi: Potential Code Injection with Database Services using H2","id":"CVE-2023-34468","kev_date_added":null,"published":"2023-06-12"},{"cvss_score":8.8,"headline":"Improper Neutralization of Command Elements in Shell User Group Provider","id":"CVE-2022-33140","kev_date_added":null,"published":"2022-06-15"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"2024-08-04","vendors":["n/a"]},"summary":"Trusted administrators can configure malicious XML files in Apache NiFi, enabling XXE attacks that allow external service calls and potential data exposure.","url":"https://insights.sbomify.com/CVE-2020-13940/"}