{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-21387 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-21387 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-21387 is a medium-severity cross-site scripting vulnerability in n/a, published on 4 Oct 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-2020-21387 and fix it if it is affected.\n\nWhat it is: CVE-2020-21387 is a medium-severity cross-site scripting vulnerability in n/a, published on 4 Oct 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-2020-21387 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2020-21387/ (Markdown: https://insights.sbomify.com/CVE-2020-21387/index.md)","id":"CVE-2020-21387","markdown":"https://insights.sbomify.com/CVE-2020-21387/index.md","name":"CVE-2020-21387","record":{"aliases":["GHSA-h27q-vg4q-q84x"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["account_takeover","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Maccms CMS","requires_auth":"none","summary":"Attackers can steal administrator cookies via XSS in Maccms, leading to privilege escalation and account takeover.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"maccms","vendor":"maccms"}],"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":"A cross-site scripting (XSS) vulnerability in the parameter type_en of Maccms 10 allows attackers to obtain the administrator cookie and escalate privileges via a crafted payload.","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 n/a","id":"CVE-2020-21387","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"SQL injection in n/a","id":"CVE-2020-21394"},"packages":[],"prev":{"headline":"Cross-site request forgery in n/a","id":"CVE-2020-21386"},"products":["n/a"],"published":"2021-10-04","related":[{"cvss_score":9.8,"headline":"Auth bypass in n/a","id":"CVE-2021-45786","kev_date_added":null,"published":"2022-03-16"},{"cvss_score":9.8,"headline":"File upload in n/a","id":"CVE-2020-21359","kev_date_added":null,"published":"2021-08-11"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2017-17733","kev_date_added":null,"published":"2017-12-18"},{"cvss_score":9.1,"headline":"Server-side request forgery in n/a","id":"CVE-2025-28089","kev_date_added":null,"published":"2025-03-28"},{"cvss_score":9.1,"headline":"Server-side request forgery in n/a","id":"CVE-2025-28090","kev_date_added":null,"published":"2025-03-28"},{"cvss_score":9.1,"headline":"Server-side request forgery in n/a","id":"CVE-2025-28091","kev_date_added":null,"published":"2025-03-28"},{"cvss_score":8.8,"headline":"Server-side request forgery in n/a","id":"CVE-2022-47872","kev_date_added":null,"published":"2023-02-01"}],"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":["n/a"]},"summary":"Attackers can steal administrator cookies via XSS in Maccms, leading to privilege escalation and account takeover.","url":"https://insights.sbomify.com/CVE-2020-21387/"}