{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21491 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21491 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21491 is a medium-severity vulnerability in Sap Netweaver Application Server Java, published on 10 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-21491 and fix it if it is affected.\n\nWhat it is: CVE-2021-21491 is a medium-severity vulnerability in Sap Netweaver Application Server Java, published on 10 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-21491 in the wild and no public exploit code.\n\nAffected product: Sap Netweaver Application Server Java. 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-2021-21491/ (Markdown: https://insights.sbomify.com/CVE-2021-21491/index.md)","id":"CVE-2021-21491","markdown":"https://insights.sbomify.com/CVE-2021-21491/index.md","name":"CVE-2021-21491","record":{"aliases":["GHSA-5hw2-3847-332f"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"SAP NetWeaver AS Java","requires_auth":"none","summary":"Attackers can redirect users to malicious sites via Reverse Tabnabbing in SAP NetWeaver Application Server Java WebDynpro applications.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"sap","cpe":[{"product":"netweaver_application_server_java","vendor":"sap"}],"cvss":{"score":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","version":"3.0"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"SAP Netweaver Application Server Java (Applications based on WebDynpro Java) versions 7.00, 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, allow an attacker to redirect users to a malicious site due to Reverse Tabnabbing vulnerabilities.","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":"Open redirect in SAP NetWeaver Application Server Java (Applications based on Web Dynpro Java)","id":"CVE-2021-21491","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"sap:netweaver_application_server_java","products":["sap:netweaver_application_server_java"],"type":"open_redirect","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Other in SAP NetWeaver AS for JAVA (HTTP Service)","id":"CVE-2021-21492"},"packages":[],"prev":{"headline":"Cross-site scripting in SAP NetWeaver AS for ABAP (Web Survey)","id":"CVE-2021-21490"},"products":["SAP NetWeaver Application Server Java (Applications based on Web Dynpro Java)"],"published":"2021-03-10","related":[{"cvss_score":10,"headline":"SAP NetWeaver Missing Authentication for Critical Function","id":"CVE-2020-6287","kev_date_added":"2021-11-03","published":"2020-07-14"},{"cvss_score":10,"headline":"SAP NetWeaver Remote Code Execution","id":"CVE-2010-5326","kev_date_added":"2021-11-03","published":"2016-05-13"},{"cvss_score":9.8,"headline":"SAP NetWeaver SQL Injection","id":"CVE-2016-2386","kev_date_added":"2022-06-09","published":"2016-02-16"},{"cvss_score":7.5,"headline":"SAP NetWeaver Directory Traversal","id":"CVE-2017-12637","kev_date_added":"2025-03-19","published":"2017-08-07"},{"cvss_score":7.5,"headline":"SAP NetWeaver Directory Traversal","id":"CVE-2016-3976","kev_date_added":"2021-11-03","published":"2016-04-07"},{"cvss_score":6.5,"headline":"SAP NetWeaver XML External Entity (XXE)","id":"CVE-2016-9563","kev_date_added":"2021-11-03","published":"2016-11-23"},{"cvss_score":5.3,"headline":"SAP NetWeaver Information Disclosure","id":"CVE-2016-2388","kev_date_added":"2022-06-09","published":"2016-02-16"}],"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":["SAP SE"]},"summary":"Attackers can redirect users to malicious sites via Reverse Tabnabbing in SAP NetWeaver Application Server Java WebDynpro applications.","url":"https://insights.sbomify.com/CVE-2021-21491/"}