{"answers":{"affected":"2 open source packages ship an affected version, including js-extend. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-25945 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-25945 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-25945 is a critical code injection vulnerability in js-extend, published on 26 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-25945 and fix it if it is affected.\n\nWhat it is: CVE-2021-25945 is a critical code injection vulnerability in js-extend, published on 26 May 2021. 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-2021-25945 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- js-extend (npm): affected all versions up to 1.0.1; no fix listed\n- js-extend (npm): affected all versions up to 1.0.1; no fix listed\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-2021-25945/ (Markdown: https://insights.sbomify.com/CVE-2021-25945/index.md)","id":"CVE-2021-25945","markdown":"https://insights.sbomify.com/CVE-2021-25945/index.md","name":"CVE-2021-25945","record":{"aliases":["GHSA-mh82-55cm-6gfh"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript utility library","requires_auth":"none","summary":"Prototype pollution in js-extend allows attackers to cause denial of service and potentially execute remote code.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mend","cpe":[{"product":"js-extend","vendor":"js-extend_project"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.","ecosystems":["npm"],"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":"Prototype pollution vulnerability in js-extend","id":"CVE-2021-25945","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2021"},"n_packages":2,"n_references":1,"next":{"headline":"Prototype pollution in nconf-toml","id":"CVE-2021-25946"},"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.0.1"],"package":"js-extend","purl":null,"source":"GHSA-mh82-55cm-6gfh"},{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.0.1"],"package":"js-extend","purl":"pkg:npm/js-extend","source":"GHSA-mh82-55cm-6gfh"}],"prev":{"headline":"deep-defaults vulnerable to prototype pollution","id":"CVE-2021-25944"},"products":["js-extend"],"published":"2021-05-26","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":"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":"2024-08-03","vendors":["n/a"]},"summary":"Prototype pollution in js-extend allows attackers to cause denial of service and potentially execute remote code.","url":"https://insights.sbomify.com/CVE-2021-25945/"}