{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-37630 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-37630 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-37630 is a medium-severity missing authorization vulnerability in nextcloud security-advisories, published on 7 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-37630 and fix it if it is affected.\n\nWhat it is: CVE-2021-37630 is a medium-severity missing authorization vulnerability in nextcloud security-advisories, published on 7 Sep 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-2021-37630 in the wild and no public exploit code.\n\nAffected product: nextcloud security-advisories. 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-2021-37630/ (Markdown: https://insights.sbomify.com/CVE-2021-37630/index.md)","id":"CVE-2021-37630","markdown":"https://insights.sbomify.com/CVE-2021-37630/index.md","name":"CVE-2021-37630","record":{"aliases":["GHSA-56j9-3rj4-wvgm"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Nextcloud Circles app","requires_auth":"low_privilege","summary":"Attackers can join secret circles without approval, leaking private information in Nextcloud Circles applications.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"circles","vendor":"nextcloud"}],"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-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application allowed any user to join any \"Secret Circle\" without approval by the Circle owner leaking private information. It is recommended that Nextcloud Circles is upgraded to 0.19.15, 0.20.11 or 0.21.4. There are no workarounds for this issue.","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":"Secret Circle can be joined without approval in Nextcloud Circles","id":"CVE-2021-37630","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Circle can be accessed by non-Circle members in Nextcloud Deck","id":"CVE-2021-37631"},"packages":[],"prev":{"headline":"Lack of ratelimit on Richdocuments OCS endpoint in nextcloud","id":"CVE-2021-37629"},"products":["security-advisories"],"published":"2021-09-07","related":[{"cvss_score":5.8,"headline":"Cross-Site Scripting in Nextcloud Circles","id":"CVE-2021-32782","kev_date_added":null,"published":"2021-09-07"},{"cvss_score":4.3,"headline":"Missing authorization in Nextcloud Circles","id":"CVE-2019-15610","kev_date_added":null,"published":"2020-02-04"}],"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":"2024-08-04","vendors":["nextcloud"]},"summary":"Attackers can join secret circles without approval, leaking private information in Nextcloud Circles applications.","url":"https://insights.sbomify.com/CVE-2021-37630/"}