{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-41179 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-41179 is a medium-severity authentication bypass vulnerability in nextcloud security-advisories, published on 25 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-41179 and fix it if it is affected.\n\nWhat it is: CVE-2021-41179 is a medium-severity authentication bypass vulnerability in nextcloud security-advisories, published on 25 Oct 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-2021-41179 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-2021-41179/ (Markdown: https://insights.sbomify.com/CVE-2021-41179/index.md)","id":"CVE-2021-41179","markdown":"https://insights.sbomify.com/CVE-2021-41179/index.md","name":"CVE-2021-41179","record":{"aliases":["GHSA-7hvh-rc6f-px23"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Nextcloud Server","requires_auth":"low_privilege","summary":"Attackers can bypass Two-Factor Authentication to access private chat channels in Nextcloud Talk by exploiting public page handling flaws.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"server","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-304","name":"Missing Critical Step in Authentication"}],"description":"Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn't enforced for pages marked as public. Any page marked as `@PublicPage` could thus be accessed with a valid user session that isn't authenticated. This particularly affects the Nextcloud Talk application, as this could be leveraged to gain access to any private chat channel without going through the Two-Factor flow. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Two-Factor Authentication not enforced for pages marked as public","id":"CVE-2021-41179","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Geolocation preview links can be set to arbitrary links in nextcloud talk","id":"CVE-2021-41180"},"packages":[],"prev":{"headline":"File Traversal affecting SVG files on Nextcloud Server","id":"CVE-2021-41178"},"products":["security-advisories"],"published":"2021-10-25","related":[{"cvss_score":8.8,"headline":"File Traversal affecting SVG files on Nextcloud Server","id":"CVE-2021-41178","kev_date_added":null,"published":"2021-10-25"}],"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 bypass Two-Factor Authentication to access private chat channels in Nextcloud Talk by exploiting public page handling flaws.","url":"https://insights.sbomify.com/CVE-2021-41179/"}