{"answers":{"affected":"2 open source packages ship an affected version, including extend2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-23568 in the wild and no public exploit code.","fix":"Upgrade extend2 to 1.0.1 or later.","what":"CVE-2021-23568 is a high-severity vulnerability in extend2, published on 7 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-23568 and fix it if it is affected.\n\nWhat it is: CVE-2021-23568 is a high-severity vulnerability in extend2, published on 7 Jan 2022. 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-2021-23568 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- extend2 (npm): affected all versions; fixed in 1.0.1\n- extend2 (npm): affected all versions; fixed in 1.0.1\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-2021-23568/ (Markdown: https://insights.sbomify.com/CVE-2021-23568/index.md)","id":"CVE-2021-23568","markdown":"https://insights.sbomify.com/CVE-2021-23568/index.md","name":"CVE-2021-23568","record":{"aliases":["GHSA-gjm5-83cw-p3p2","SNYK-JS-EXTEND2-2320315"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript utility library","requires_auth":"none","summary":"Attackers can pollute JavaScript object prototypes via unsafe recursive merge, potentially leading to code execution or privilege escalation.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"extend2","vendor":"eggjs"}],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","version":"3.1"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"The package extend2 before 1.0.1 are vulnerable to Prototype Pollution via the extend function due to unsafe recursive merge.","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":true,"headline":"Prototype Pollution","id":"CVE-2021-23568","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2021"},"n_packages":2,"n_references":4,"next":{"headline":"Prototype Pollution","id":"CVE-2021-23574"},"packages":[{"ecosystem":"npm","fixed":["1.0.1"],"introduced":["0"],"last_affected":[],"package":"extend2","purl":null,"source":"GHSA-gjm5-83cw-p3p2"},{"ecosystem":"npm","fixed":["1.0.1"],"introduced":["0"],"last_affected":[],"package":"extend2","purl":"pkg:npm/extend2","source":"GHSA-gjm5-83cw-p3p2"}],"prev":{"headline":"Denial of Service (DoS)","id":"CVE-2021-23567"},"products":["extend2"],"published":"2022-01-07","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":"2024-09-16","vendors":["n/a"]},"summary":"Attackers can pollute JavaScript object prototypes via unsafe recursive merge, potentially leading to code execution or privilege escalation.","url":"https://insights.sbomify.com/CVE-2021-23568/"}