{"answers":{"affected":"2 open source packages ship an affected version, including react-router.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-43865 exists.","fix":"Upgrade react-router to 7.5.2 or later.","what":"CVE-2025-43865 is a high-severity vulnerability in remix-run react-router, published on 25 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-43865 and fix it if it is affected.\n\nWhat it is: CVE-2025-43865 is a high-severity vulnerability in remix-run react-router, published on 25 Apr 2025. 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-2025-43865 exists.\n\nAffected packages and fixed versions:\n- react-router (npm): affected from 7.0.0-pre.0; fixed in 7.5.2\n- react-router (npm): affected from 7.0.0-pre.0; fixed in 7.5.2\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-2025-43865/ (Markdown: https://insights.sbomify.com/CVE-2025-43865/index.md)","id":"CVE-2025-43865","markdown":"https://insights.sbomify.com/CVE-2025-43865/index.md","name":"CVE-2025-43865","record":{"aliases":["GHSA-cpj6-fhp6-mr6j"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"React Router library","requires_auth":"none","summary":"Attackers can spoof pre-rendered data in React Router framework mode by manipulating request headers, requiring specific configuration to exploit.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"description":"React Router is a router for React. In versions on the 7.0 branch prior to version 7.5.2, it's possible to modify pre-rendered data by adding a header to the request. This allows to completely spoof its contents and modify all the values ​​of the data object passed to the HTML. This issue has been patched in version 7.5.2.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":"2025-04-27","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2025-04-27T11:30:16Z","kind":"github_poc","ref":"https://github.com/pouriam23/Pre-render-data-spoofing-on-React-Router-framework-mode-CVE-2025-43865","stars":0,"title":null}],"tier":"weaponised"},"has_fix":true,"headline":"React Router allows pre-render data spoofing on React-Router framework mode","id":"CVE-2025-43865","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2025"},"n_packages":2,"n_references":3,"next":{"headline":"Vantage6 Server JWT secret not cryptographically secure","id":"CVE-2025-43866"},"packages":[{"ecosystem":"npm","fixed":["7.5.2"],"introduced":["7.0.0-pre.0"],"last_affected":[],"package":"react-router","purl":null,"source":"GHSA-cpj6-fhp6-mr6j"},{"ecosystem":"npm","fixed":["7.5.2"],"introduced":["7.0.0-pre.0"],"last_affected":[],"package":"react-router","purl":"pkg:npm/react-router","source":"GHSA-cpj6-fhp6-mr6j"}],"prev":{"headline":"React Router allows a DoS via cache poisoning by forcing SPA mode","id":"CVE-2025-43864"},"products":["react-router"],"published":"2025-04-25","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-25","vendors":["remix-run"]},"summary":"Attackers can spoof pre-rendered data in React Router framework mode by manipulating request headers, requiring specific configuration to exploit.","url":"https://insights.sbomify.com/CVE-2025-43865/"}