{"answers":{"affected":"6 open source packages ship an affected version, including github.com/microcosm-cc/bluemonday and pybluemonday. It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-42576 in the wild and no public exploit code.","fix":"Upgrade github.com/microcosm-cc/bluemonday to 1.0.16 or later.","what":"CVE-2021-42576 is a critical cross-site scripting vulnerability in n/a, published on 18 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-42576 and fix it if it is affected.\n\nWhat it is: CVE-2021-42576 is a critical cross-site scripting vulnerability in n/a, published on 18 Oct 2021. 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-2021-42576 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/microcosm-cc/bluemonday (Go): affected all versions; fixed in 1.0.16\n- github.com/microcosm-cc/bluemonday (Go): affected all versions; fixed in 1.0.16\n- github.com/microcosm-cc/bluemonday (Go): affected all versions; fixed in 1.0.16\n- pybluemonday (PyPI): affected all versions; fixed in 0.0.8\n- pybluemonday (PyPI): affected all versions; fixed in 0.0.8\n- pybluemonday (PyPI): affected all versions; fixed in 0.0.8\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-2021-42576/ (Markdown: https://insights.sbomify.com/CVE-2021-42576/index.md)","id":"CVE-2021-42576","markdown":"https://insights.sbomify.com/CVE-2021-42576/index.md","name":"CVE-2021-42576","record":{"aliases":["DEBIAN-CVE-2021-42576","GHSA-x95h-979x-cf3j","GO-2022-0588","PYSEC-2021-849","UBUNTU-CVE-2021-42576"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Go/Python HTML sanitizer","requires_auth":"none","summary":"Attackers can inject malicious scripts via SELECT, STYLE, or OPTION elements due to improper policy enforcement in the bluemonday sanitizer.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"bluemonday","vendor":"microco"},{"product":"pybluemonday","vendor":"python"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"The bluemonday sanitizer before 1.0.16 for Go, and before 0.0.8 for Python (in pybluemonday), does not properly enforce policies associated with the SELECT, STYLE, and OPTION elements.","ecosystems":["Go","PyPI"],"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":"Policies not properly enforced in bluemonday","id":"CVE-2021-42576","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"xss","year":"2021"},"n_packages":6,"n_references":1,"next":{"headline":"Null dereference in n/a","id":"CVE-2021-42577"},"packages":[{"ecosystem":"Go","fixed":["1.0.16"],"introduced":["0"],"last_affected":[],"package":"github.com/microcosm-cc/bluemonday","purl":null,"source":"GHSA-x95h-979x-cf3j"},{"ecosystem":"Go","fixed":["1.0.16"],"introduced":["0"],"last_affected":[],"package":"github.com/microcosm-cc/bluemonday","purl":"pkg:golang/github.com/microcosm-cc/bluemonday","source":"GHSA-x95h-979x-cf3j"},{"ecosystem":"Go","fixed":["1.0.16"],"introduced":["0"],"last_affected":[],"package":"github.com/microcosm-cc/bluemonday","purl":"pkg:golang/github.com/microcosm-cc/bluemonday","source":"GO-2022-0588"},{"ecosystem":"PyPI","fixed":["0.0.8"],"introduced":["0"],"last_affected":[],"package":"pybluemonday","purl":null,"source":"GHSA-x95h-979x-cf3j"},{"ecosystem":"PyPI","fixed":["0.0.8"],"introduced":["0"],"last_affected":[],"package":"pybluemonday","purl":"pkg:pypi/pybluemonday","source":"GHSA-x95h-979x-cf3j"},{"ecosystem":"PyPI","fixed":["0.0.8"],"introduced":["0"],"last_affected":[],"package":"pybluemonday","purl":"pkg:pypi/pybluemonday","source":"PYSEC-2021-849"}],"prev":{"headline":"Policies not properly enforced in OWASP Java HTML Sanitizer","id":"CVE-2021-42575"},"products":["n/a"],"published":"2021-10-18","related":[{"cvss_score":6.1,"headline":"Cross-site scripting in bluemonday","id":"CVE-2021-29272","kev_date_added":null,"published":"2021-03-27"}],"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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can inject malicious scripts via SELECT, STYLE, or OPTION elements due to improper policy enforcement in the bluemonday sanitizer.","url":"https://insights.sbomify.com/CVE-2021-42576/"}