{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-8923 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-8923 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-8923 is a medium-severity cross-site scripting vulnerability in Google Dart SDK, published on 26 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-8923 and fix it if it is affected.\n\nWhat it is: CVE-2020-8923 is a medium-severity cross-site scripting vulnerability in Google Dart SDK, published on 26 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2020-8923 in the wild and no public exploit code.\n\nAffected product: Google Dart SDK. 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-2020-8923/ (Markdown: https://insights.sbomify.com/CVE-2020-8923/index.md)","id":"CVE-2020-8923","markdown":"https://insights.sbomify.com/CVE-2020-8923/index.md","name":"CVE-2020-8923","record":{"aliases":["GHSA-hfq3-v9pv-p627"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Dart SDK","requires_auth":"none","summary":"An attacker can inject malicious HTML or JavaScript into Dart applications via DOM Clobbering, bypassing sanitization and potentially executing arbitrary code.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Google","cpe":[{"product":"dart_software_development_kit","vendor":"dart"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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":"An improper HTML sanitization in Dart versions up to and including 2.7.1 and dev versions 2.8.0-dev.16.0, allows an attacker leveraging DOM Clobbering techniques to skip the sanitization and inject custom html/javascript (XSS). Mitigation: update your Dart SDK to 2.7.2, and 2.8.0-dev.17.0 for the dev version. If you cannot update, we recommend you review the way you use the affected APIs, and pay special attention to cases where user-provided data is used to populate DOM nodes. Consider using Element.innerText or Node.text to populate DOM elements.","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":"XSS in Dart","id":"CVE-2020-8923","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Buffer overflow in Brotli library","id":"CVE-2020-8927"},"packages":[],"prev":{"headline":"Overoptimization leads to private information leak in Gerrit","id":"CVE-2020-8920"},"products":["Dart SDK"],"published":"2020-03-26","related":[{"cvss_score":9.8,"headline":"Incorrect parsing of the backslash characters in Dart library","id":"CVE-2022-3095","kev_date_added":null,"published":"2022-10-27"},{"cvss_score":8.8,"headline":"Dart - Publishing to third-party package repositories may expose pub.dev credentials","id":"CVE-2021-22568","kev_date_added":null,"published":"2021-12-09"},{"cvss_score":6.6,"headline":"Dart SDK and Flutter SDK have Zip slip in Dart Pub package extraction","id":"CVE-2026-27704","kev_date_added":null,"published":"2026-02-25"},{"cvss_score":6.5,"headline":"Auth bypass in Dark SDK","id":"CVE-2022-0451","kev_date_added":null,"published":"2022-02-18"},{"cvss_score":6.1,"headline":"XSS in Dart SDK","id":"CVE-2021-22540","kev_date_added":null,"published":"2021-04-22"},{"cvss_score":4.6,"headline":"Bidirectional Override in Dart SDK","id":"CVE-2021-22567","kev_date_added":null,"published":"2022-01-05"}],"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":["Google"]},"summary":"An attacker can inject malicious HTML or JavaScript into Dart applications via DOM Clobbering, bypassing sanitization and potentially executing arbitrary code.","url":"https://insights.sbomify.com/CVE-2020-8923/"}