{"answers":{"affected":"2 open source packages ship an affected version, including nodebb. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-43787 in the wild and no public exploit code.","fix":"Upgrade nodebb to 1.18.5 or later.","what":"CVE-2021-43787 is a critical cross-site scripting vulnerability in NodeBB, published on 29 Nov 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-43787 and fix it if it is affected.\n\nWhat it is: CVE-2021-43787 is a critical cross-site scripting vulnerability in NodeBB, published on 29 Nov 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-43787 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nodebb (npm): affected from 1.15.0; fixed in 1.18.5\n- nodebb (npm): affected from 1.15.0; fixed in 1.18.5\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-2021-43787/ (Markdown: https://insights.sbomify.com/CVE-2021-43787/index.md)","id":"CVE-2021-43787","markdown":"https://insights.sbomify.com/CVE-2021-43787/index.md","name":"CVE-2021-43787","record":{"aliases":["GHSA-wx69-rvg3-x7fc"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"NodeBB forum software","requires_auth":"low_privilege","summary":"A prototype pollution flaw in NodeBB's uploader module allows attackers to inject JavaScript, potentially leading to account takeover.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nodebb","vendor":"nodebb"}],"cvss":{"score":9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"},{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"Nodebb is an open source Node.js based forum software. In affected versions a prototype pollution vulnerability in the uploader module allowed a malicious user to inject arbitrary data (i.e. javascript) into the DOM, theoretically allowing for an account takeover when used in conjunction with a path traversal vulnerability disclosed at the same time as this report. The vulnerability has been patched as of v1.18.5. Users are advised to upgrade as soon as possible.","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":"XSS via prototype pollution","id":"CVE-2021-43787","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2021"},"n_packages":2,"n_references":4,"next":{"headline":"Path traversal in translator module of NobeBB","id":"CVE-2021-43788"},"packages":[{"ecosystem":"npm","fixed":["1.18.5"],"introduced":["1.15.0"],"last_affected":[],"package":"nodebb","purl":null,"source":"GHSA-wx69-rvg3-x7fc"},{"ecosystem":"npm","fixed":["1.18.5"],"introduced":["1.15.0"],"last_affected":[],"package":"nodebb","purl":"pkg:npm/nodebb","source":"GHSA-wx69-rvg3-x7fc"}],"prev":{"headline":"API token verification can be bypassed","id":"CVE-2021-43786"},"products":["NodeBB"],"published":"2021-11-29","related":[{"cvss_score":10,"headline":"NodeBB vulnerable to path traversal and code execution via prototype vulnerability","id":"CVE-2023-26045","kev_date_added":null,"published":"2023-07-24"},{"cvss_score":9.9,"headline":"Account takeover in NodeBB","id":"CVE-2020-15149","kev_date_added":null,"published":"2020-08-19"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2023-43187","kev_date_added":null,"published":"2023-09-26"},{"cvss_score":9.8,"headline":"API token verification can be bypassed","id":"CVE-2021-43786","kev_date_added":null,"published":"2021-11-29"},{"cvss_score":9.4,"headline":"Account takeover via prototype vulnerability","id":"CVE-2022-46164","kev_date_added":null,"published":"2022-12-05"},{"cvss_score":9,"headline":"Account takeover via cryptographically weak PRNG in NodeBB Forum","id":"CVE-2022-36045","kev_date_added":null,"published":"2022-08-31"}],"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":"2024-08-04","vendors":["NodeBB"]},"summary":"A prototype pollution flaw in NodeBB's uploader module allows attackers to inject JavaScript, potentially leading to account takeover.","url":"https://insights.sbomify.com/CVE-2021-43787/"}