{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-4070 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-4070 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-4070 is a medium-severity cross-site scripting vulnerability in World Wide Web Consortium (W3C) CSS Validator, published on 22 Jun 2020. 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-2020-4070 and fix it if it is affected.\n\nWhat it is: CVE-2020-4070 is a medium-severity cross-site scripting vulnerability in World Wide Web Consortium (W3C) CSS Validator, published on 22 Jun 2020. 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-2020-4070 in the wild and no public exploit code.\n\nAffected product: World Wide Web Consortium (W3C) CSS Validator. 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-2020-4070/ (Markdown: https://insights.sbomify.com/CVE-2020-4070/index.md)","id":"CVE-2020-4070","markdown":"https://insights.sbomify.com/CVE-2020-4070/index.md","name":"CVE-2020-4070","record":{"aliases":["GHSA-wf36-7w73-rh8c"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"W3C CSS Validator","requires_auth":"low_privilege","summary":"An attacker can execute arbitrary scripts in a victim's browser by tricking them into clicking a crafted link in the W3C CSS Validator.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"css_validator","vendor":"w3c"}],"cvss":{"score":4.6,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"In CSS Validator less than or equal to commit 54d68a1, there is a cross-site scripting vulnerability in handling URIs. A user would have to click on a specifically crafted validator link to trigger it. This has been patched in commit e5c09a9.","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":"Cross-site Scripting in CSS Validator","id":"CVE-2020-4070","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2020"},"n_packages":0,"n_references":2,"next":{"headline":"Timing attack on django-basic-auth-ip-whitelist","id":"CVE-2020-4071"},"packages":[],"prev":{"headline":"Heap-based Buffer Overflow in APNSwift","id":"CVE-2020-4068"},"products":["CSS Validator"],"published":"2020-06-22","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":"2024-08-04","vendors":["World Wide Web Consortium (W3C)"]},"summary":"An attacker can execute arbitrary scripts in a victim's browser by tricking them into clicking a crafted link in the W3C CSS Validator.","url":"https://insights.sbomify.com/CVE-2020-4070/"}