{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-54398 exists.","fix":"No fix has been published for CVE-2023-54398 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-54398 is a critical unsafe deserialization vulnerability in Yonyou U8 Cloud, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-54398 and fix it if it is affected.\n\nWhat it is: CVE-2023-54398 is a critical unsafe deserialization vulnerability in Yonyou U8 Cloud, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-54398 exists.\n\nAffected product: Yonyou U8 Cloud. 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-2023-54398/ (Markdown: https://insights.sbomify.com/CVE-2023-54398/index.md)","id":"CVE-2023-54398","markdown":"https://insights.sbomify.com/CVE-2023-54398/index.md","name":"CVE-2023-54398","record":{"aliases":["GHSA-r89p-qrrf-vpmc"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Yonyou U8 Cloud","requires_auth":"none","summary":"Unauthenticated attackers can execute arbitrary OS commands in Yonyou U8 Cloud via unsafe Java deserialization in FileManageServlet.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Yonyou U8 Cloud contains an unauthenticated Java deserialization vulnerability in the nc.impl.pub.filesystem.FileManageServlet component that allows remote unauthenticated attackers to execute arbitrary OS commands by sending a serialized payload via POST request. Attackers can exploit the doAction method, which passes raw HTTP request body data directly to ObjectInputStream.readObject() without filtering, to achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-02-13.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Yonyou U8 Cloud Java Deserialization RCE via FileManageServlet","id":"CVE-2023-54398","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2023"},"n_packages":0,"n_references":6,"next":{"headline":"Hongjing e-HR \u003c 8.2 SQL Injection via /servlet/codesettree","id":"CVE-2023-54399"},"packages":[],"prev":{"headline":"Tornado before 6.3.3 HTTP Request Smuggling via Content-Length","id":"CVE-2023-54397"},"products":["U8 Cloud"],"published":"2026-09-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["Yonyou"]},"summary":"Unauthenticated attackers can execute arbitrary OS commands in Yonyou U8 Cloud via unsafe Java deserialization in FileManageServlet.","url":"https://insights.sbomify.com/CVE-2023-54398/"}