{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-49792 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-49792 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-49792 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 22 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-49792 and fix it if it is affected.\n\nWhat it is: CVE-2023-49792 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 22 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-49792 in the wild and no public exploit code.\n\nAffected product: Nextcloud Nextcloud 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-2023-49792/ (Markdown: https://insights.sbomify.com/CVE-2023-49792/index.md)","id":"CVE-2023-49792","markdown":"https://insights.sbomify.com/CVE-2023-49792/index.md","name":"CVE-2023-49792","record":{"aliases":["GHSA-5j2p-q736-hw98"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Nextcloud Server","requires_auth":"none","summary":"Attackers can bypass brute-force protection in Nextcloud Server when a reverse proxy is misconfigured, allowing excessive authentication attempts.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nextcloud_server","vendor":"nextcloud"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-307","name":"Improper Restriction of Excessive Authentication Attempts"}],"description":"Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when a (reverse) proxy is configured as trusted proxy the server could be tricked into reading a wrong remote address for an attacker, allowing them executing authentication attempts than intended. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-08-31","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-08-31T21:08:33Z","kind":"github_poc","ref":"https://github.com/CStockdale1/nextcloud-cve-2023-49792-research","stars":0,"title":"A project analysis of CVE-2023-49792, inspired by a HackerOne report I have recently come across."}],"tier":"poc_unverified"},"has_fix":false,"headline":"Bruteforce protection can be bypassed with misconfigured proxy","id":"CVE-2023-49792","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"nextcloud:nextcloud_server","products":["nextcloud:nextcloud_server"],"type":"security_feature_bypass","year":"2023"},"n_packages":0,"n_references":3,"next":{"headline":"Path traversal in `CodeChecker server` in the endpoint of `CodeChecker store`","id":"CVE-2023-49793"},"packages":[],"prev":{"headline":"Workflows do not require password confirmation on API level","id":"CVE-2023-49791"},"products":["security-advisories"],"published":"2023-12-22","related":[{"cvss_score":9.3,"headline":"Preview generation used third-party library not suited for user-generated content in Nextcloud server","id":"CVE-2021-32802","kev_date_added":null,"published":"2021-09-07"},{"cvss_score":9.1,"headline":"Scope of workflow operations is not validated in nextcloud server","id":"CVE-2023-26482","kev_date_added":null,"published":"2023-03-30"},{"cvss_score":8.8,"headline":"Auth bypass in Nextcloud Server","id":"CVE-2018-3775","kev_date_added":null,"published":"2018-08-12"},{"cvss_score":8.7,"headline":"Nextcloud Server password reset endpoint is not brute force protected","id":"CVE-2023-35172","kev_date_added":null,"published":"2023-06-23"},{"cvss_score":8.7,"headline":"Nextcloud Server's brute force protection allows someone to send more requests than intended","id":"CVE-2023-32320","kev_date_added":null,"published":"2023-06-22"},{"cvss_score":8.6,"headline":"Trusted servers exchange can be triggered by attacker","id":"CVE-2021-32656","kev_date_added":null,"published":"2021-06-01"},{"cvss_score":8.5,"headline":"Nextcloud Server users can make external storage mount points inaccessible for other users","id":"CVE-2023-48239","kev_date_added":null,"published":"2023-11-21"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-08-27","vendors":["nextcloud"]},"summary":"Attackers can bypass brute-force protection in Nextcloud Server when a reverse proxy is misconfigured, allowing excessive authentication attempts.","url":"https://insights.sbomify.com/CVE-2023-49792/"}