{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-28645 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-28645 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-28645 is a medium-severity vulnerability in nextcloud security-advisories, published on 31 Mar 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2023-28645 and fix it if it is affected.\n\nWhat it is: CVE-2023-28645 is a medium-severity vulnerability in nextcloud security-advisories, published on 31 Mar 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2023-28645 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-2023-28645/ (Markdown: https://insights.sbomify.com/CVE-2023-28645/index.md)","id":"CVE-2023-28645","markdown":"https://insights.sbomify.com/CVE-2023-28645/index.md","name":"CVE-2023-28645","record":{"aliases":["GHSA-95j6-p5cj-5hh5"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Nextcloud richdocuments app","requires_auth":"low_privilege","summary":"Attackers can bypass secure view restrictions in Nextcloud richdocuments via an unprotected internal API endpoint, allowing unauthorized document access.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"richdocuments","vendor":"nextcloud"}],"cvss":{"score":5.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"Nextcloud richdocuments is a Nextcloud app integrating the office suit Collabora Online. In affected versions the secure view feature of the rich documents app can be bypassed by using unprotected internal API endpoint of the rich documents app. It is recommended that the Nextcloud Office app (richdocuments) is upgraded to 8.0.0-beta.1, 7.0.2 or 6.3.2. Users unable to upgrade may mitigate the issue by taking steps to restrict the ability to download documents. This includes ensuring that the `WOPI configuration` is configured to only serve documents between Nextcloud and Collabora. It is highly recommended to define the list of Collabora server IPs as the allow list within the Office admin settings of Nextcloud.","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":"Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments","id":"CVE-2023-28645","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2023"},"n_packages":0,"n_references":3,"next":{"headline":"App lockout in nextcloud Android app can be bypassed via thirdparty apps","id":"CVE-2023-28646"},"packages":[],"prev":{"headline":"Reference fetch can saturate the server bandwidth for 10 seconds in nextcloud server","id":"CVE-2023-28644"},"products":["security-advisories"],"published":"2023-03-31","related":[{"cvss_score":7.5,"headline":"File Drop can be bypassed using Richdocuments app in nextcloud","id":"CVE-2021-37628","kev_date_added":null,"published":"2021-09-07"},{"cvss_score":6.5,"headline":"Federated editing allows iframing remote servers by default in richdocuments","id":"CVE-2022-31024","kev_date_added":null,"published":"2022-06-02"},{"cvss_score":5.8,"headline":"Document content of files can be obtained through Collabora for files of other users","id":"CVE-2023-25150","kev_date_added":null,"published":"2023-02-08"},{"cvss_score":5.3,"headline":"Lack of ratelimit on Richdocuments OCS endpoint in nextcloud","id":"CVE-2021-37629","kev_date_added":null,"published":"2021-09-07"},{"cvss_score":4.8,"headline":"File path disclosure of shared files in Richdocuments application","id":"CVE-2021-39223","kev_date_added":null,"published":"2021-10-25"},{"cvss_score":4.3,"headline":"WOPI API not protected by credentials/IP check","id":"CVE-2021-32748","kev_date_added":null,"published":"2021-07-27"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-02-11","vendors":["nextcloud"]},"summary":"Attackers can bypass secure view restrictions in Nextcloud richdocuments via an unprotected internal API endpoint, allowing unauthorized document access.","url":"https://insights.sbomify.com/CVE-2023-28645/"}