{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21396 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21396 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21396 is a medium-severity vulnerability in wireapp wire-server, published on 26 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-21396 and fix it if it is affected.\n\nWhat it is: CVE-2021-21396 is a medium-severity vulnerability in wireapp wire-server, published on 26 Mar 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-2021-21396 in the wild and no public exploit code.\n\nAffected product: wireapp wire-server. 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-2021-21396/ (Markdown: https://insights.sbomify.com/CVE-2021-21396/index.md)","id":"CVE-2021-21396","markdown":"https://insights.sbomify.com/CVE-2021-21396/index.md","name":"CVE-2021-21396","record":{"aliases":["GHSA-qx8q-rhq2-rg4j"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Wire backend server","requires_auth":"low_privilege","summary":"Logged-in users can access sensitive client metadata of other users via an exposed endpoint, requiring an upgrade to the Wire backend server.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"wire_server","vendor":"wire"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"wire-server is an open-source back end for Wire, a secure collaboration platform. In wire-server from version 2021-02-16 and before version 2021-03-02, the client metadata of all users was exposed in the `GET /users/list-clients` endpoint. The endpoint could be used by any logged in user who could request client details of any other user (no connection required) as far as they can find their User ID. The exposed metadata included id, class, type, location, time, and cookie. A user on a Wire backend could use this endpoint to find registration time and location for each device for a given list of users. As a workaround, remove `/list-clients` from nginx config. This has been fixed in version 2021-03-02.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Bulk list client endpoint exposes too much metadata about a client","id":"CVE-2021-21396","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Possible XSS injection through DataColumn Grid class","id":"CVE-2021-21398"},"packages":[],"prev":{"headline":"Magneto-lts vulnerable to Cross-Site Request Forgery","id":"CVE-2021-21395"},"products":["wire-server"],"published":"2021-03-26","related":[{"cvss_score":9.8,"headline":"Auth bypass in wire-server","id":"CVE-2022-31122","kev_date_added":null,"published":"2022-10-18"},{"cvss_score":5.7,"headline":"CORS `Access-Control-Allow-Origin` settings are too lenient","id":"CVE-2021-41101","kev_date_added":null,"published":"2021-09-30"}],"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":["wireapp"]},"summary":"Logged-in users can access sensitive client metadata of other users via an exposed endpoint, requiring an upgrade to the Wire backend server.","url":"https://insights.sbomify.com/CVE-2021-21396/"}