{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-8297 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-8297 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-8297 is a medium-severity missing authorization vulnerability in Nextcloud Deck, published on 23 Feb 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-8297 and fix it if it is affected.\n\nWhat it is: CVE-2020-8297 is a medium-severity missing authorization vulnerability in Nextcloud Deck, published on 23 Feb 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-2020-8297 in the wild and no public exploit code.\n\nAffected product: Nextcloud Deck. 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-2020-8297/ (Markdown: https://insights.sbomify.com/CVE-2020-8297/index.md)","id":"CVE-2020-8297","markdown":"https://insights.sbomify.com/CVE-2020-8297/index.md","name":"CVE-2020-8297","record":{"aliases":["GHSA-hx5m-93g9-j2jh"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Nextcloud Deck app","requires_auth":"low_privilege","summary":"Attackers with duplicate identifiers can access deleted users' deck data due to insecure direct object reference in Nextcloud Deck.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"deck","vendor":"nextcloud"}],"cvss":{"score":4.3,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"Nextcloud Deck before 1.0.2 suffers from an insecure direct object reference (IDOR) vulnerability that permits users with a duplicate user identifier to access deck data of a previous deleted user.","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":"Missing authorization in Nextcloud Deck","id":"CVE-2020-8297","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2020"},"n_packages":0,"n_references":3,"next":{"headline":"Command injection in fs-path","id":"CVE-2020-8298"},"packages":[],"prev":{"headline":"Information disclosure in Nextcloud Server","id":"CVE-2020-8296"},"products":["Nextcloud Deck"],"published":"2021-02-23","related":[{"cvss_score":8.1,"headline":"Missing permission check on Deck API","id":"CVE-2021-39225","kev_date_added":null,"published":"2021-10-25"},{"cvss_score":8,"headline":"Missing authorization in Nextcloud Deck","id":"CVE-2020-8182","kev_date_added":null,"published":"2020-10-05"},{"cvss_score":6.5,"headline":"Circle can be accessed by non-Circle members in Nextcloud Deck","id":"CVE-2021-37631","kev_date_added":null,"published":"2021-09-07"},{"cvss_score":6.5,"headline":"Information disclosure in Nextcloud Deck","id":"CVE-2021-22913","kev_date_added":null,"published":"2021-06-11"},{"cvss_score":5.8,"headline":"Nextcloud Deck card vulnerable to data leak to unauthorized users via reference preview cache","id":"CVE-2023-22469","kev_date_added":null,"published":"2023-01-10"},{"cvss_score":5.4,"headline":"Nextcloud Deck app allowed user with \"Can share\" permission to modify permissions of other non-owners","id":"CVE-2025-66557","kev_date_added":null,"published":"2025-12-05"},{"cvss_score":5,"headline":"Possibility for anyone to add a stack with existing tasks on anyone's board in Nextcloud Deck","id":"CVE-2022-29159","kev_date_added":null,"published":"2022-05-20"}],"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":["n/a"]},"summary":"Attackers with duplicate identifiers can access deleted users' deck data due to insecure direct object reference in Nextcloud Deck.","url":"https://insights.sbomify.com/CVE-2020-8297/"}