{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2021-20664 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20664 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20664 is a medium-severity cross-site scripting vulnerability in Six Apart Ltd. Movable Type, published on 5 Mar 2021. 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-2021-20664 and fix it if it is affected.\n\nWhat it is: CVE-2021-20664 is a medium-severity cross-site scripting vulnerability in Six Apart Ltd. Movable Type, published on 5 Mar 2021. 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-2021-20664 in the wild and no public exploit code.\n\nAffected product: Six Apart Ltd. Movable Type. 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-2021-20664/ (Markdown: https://insights.sbomify.com/CVE-2021-20664/index.md)","id":"CVE-2021-20664","markdown":"https://insights.sbomify.com/CVE-2021-20664/index.md","name":"CVE-2021-20664","record":{"aliases":["GHSA-pww3-vwvw-q638"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Movable Type CMS","requires_auth":"none","summary":"Remote attackers can inject arbitrary scripts into the Asset registration screen of Movable Type, potentially compromising user sessions or executing malicious code.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"movable_type","vendor":"movabletype"},{"product":"movable_type_advanced","vendor":"movabletype"},{"product":"movable_type_premium","vendor":"movabletype"},{"product":"movable_type_premium_advanced","vendor":"movabletype"}],"cvss":{"score":6.1,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Cross-site scripting vulnerability in in Asset registration screen of Movable Type 7 r.4705 and earlier (Movable Type 7 Series), Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series), Movable Type 6.7.5 and earlier (Movable Type 6.7 Series), Movable Type Premium 1.39 and earlier, and Movable Type Premium Advanced 1.39 and earlier allows remote attackers to inject an arbitrary script via unspecified vectors.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cross-site scripting in Movable Type","id":"CVE-2021-20664","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Cross-site scripting in Movable Type","id":"CVE-2021-20665"},"packages":[],"prev":{"headline":"Cross-site scripting in Movable Type","id":"CVE-2021-20663"},"products":["Movable Type"],"published":"2021-03-05","related":[{"cvss_score":6.1,"headline":"Cross-site scripting in Movable Type","id":"CVE-2021-20663","kev_date_added":null,"published":"2021-03-05"},{"cvss_score":6.1,"headline":"Cross-site scripting in Movable Type","id":"CVE-2021-20665","kev_date_added":null,"published":"2021-03-05"}],"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":"2024-08-03","vendors":["Six Apart Ltd."]},"summary":"Remote attackers can inject arbitrary scripts into the Asset registration screen of Movable Type, potentially compromising user sessions or executing malicious code.","url":"https://insights.sbomify.com/CVE-2021-20664/"}