{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-4296 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-4296 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-4296 is a low-severity cross-site scripting vulnerability in w3c Unicorn, published on 29 Dec 2022. 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-2021-4296 and fix it if it is affected.\n\nWhat it is: CVE-2021-4296 is a low-severity cross-site scripting vulnerability in w3c Unicorn, published on 29 Dec 2022. 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-2021-4296 in the wild and no public exploit code.\n\nAffected product: w3c Unicorn. 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-2021-4296/ (Markdown: https://insights.sbomify.com/CVE-2021-4296/index.md)","id":"CVE-2021-4296","markdown":"https://insights.sbomify.com/CVE-2021-4296/index.md","name":"CVE-2021-4296","record":{"aliases":["GHSA-9cgm-gf5x-jx5x"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"W3C Unicorn validator","requires_auth":"low_privilege","summary":"Remote attackers can inject malicious scripts via the ValidatorNuMessage function in W3C Unicorn, potentially executing code in user browsers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"unicorn","vendor":"w3"}],"cvss":{"score":3.5,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"A vulnerability, which was classified as problematic, has been found in w3c Unicorn. This issue affects the function ValidatorNuMessage of the file src/org/w3c/unicorn/response/impl/ValidatorNuMessage.java. The manipulation of the argument message leads to cross site scripting. The attack may be initiated remotely. The name of the patch is 51f75c31f7fc33859a9a571311c67ae4e95d9c68. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-217019.","ecosystems":[],"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":"w3c Unicorn ValidatorNuMessage.java ValidatorNuMessage cross site scripting","id":"CVE-2021-4296","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"trampgeek jobe Restapi.php runs_post Privilege Escalation","id":"CVE-2021-4297"},"packages":[],"prev":{"headline":"XML external entity in code-validator-api","id":"CVE-2021-4295"},"products":["Unicorn"],"published":"2022-12-29","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":["w3c"]},"summary":"Remote attackers can inject malicious scripts via the ValidatorNuMessage function in W3C Unicorn, potentially executing code in user browsers.","url":"https://insights.sbomify.com/CVE-2021-4296/"}