{"answers":{"affected":"It affects 6 products.","exploited":"There is no known exploitation of CVE-2020-12137 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2020-12137 is a medium-severity cross-site scripting vulnerability in Canonical Ubuntu Linux, published on 24 Apr 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-2020-12137 and fix it if it is affected.\n\nWhat it is: CVE-2020-12137 is a medium-severity cross-site scripting vulnerability in Canonical Ubuntu Linux, published on 24 Apr 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-2020-12137 in the wild and no public exploit code.\n\nAffected product: Canonical Ubuntu Linux. 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-2020-12137/ (Markdown: https://insights.sbomify.com/CVE-2020-12137/index.md)","id":"CVE-2020-12137","markdown":"https://insights.sbomify.com/CVE-2020-12137/index.md","name":"CVE-2020-12137","record":{"aliases":["DLA-2200-1","DSA-4664-1","GHSA-7mvx-jp9h-p8gh","RHSA-2020:4667","SUSE-SU-2020:14356-1","UBUNTU-CVE-2020-12137"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Mailman mailing list","requires_auth":"none","summary":"An attacker can execute arbitrary JavaScript in the context of list-archive visitors by exploiting MIME sniffing issues in GNU Mailman.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"mailman","vendor":"gnu"},{"product":"backports_sle","vendor":"opensuse"},{"product":"leap","vendor":"opensuse"}],"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":"GNU Mailman 2.x before 2.1.30 uses the .obj extension for scrubbed application/octet-stream MIME parts. This behavior may contribute to XSS attacks against list-archive visitors, because an HTTP reply from an archive web server may lack a MIME type, and a web browser may perform MIME sniffing, conclude that the MIME type should have been text/html, and execute JavaScript code.","ecosystems":["Red Hat:enterprise_linux:8::appstream","SUSE:Linux Enterprise Point of Sale 11 SP3","SUSE:Linux Enterprise Server 11 SP4-LTSS"],"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":"Cross-site scripting in n/a","id":"CVE-2020-12137","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","opensuse:backports_sle","opensuse:leap"],"type":"xss","year":"2020"},"n_packages":5,"n_references":11,"next":{"headline":"Privilege escalation in n/a","id":"CVE-2020-12138"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["3:2.1.29-10.module+el8.3.0+6860+8e47d84b"],"introduced":["0"],"last_affected":[],"package":"mailman","purl":"pkg:rpm/redhat/mailman","source":"RHSA-2020:4667"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["3:2.1.29-10.module+el8.3.0+6860+8e47d84b"],"introduced":["0"],"last_affected":[],"package":"mailman-debuginfo","purl":"pkg:rpm/redhat/mailman-debuginfo","source":"RHSA-2020:4667"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["3:2.1.29-10.module+el8.3.0+6860+8e47d84b"],"introduced":["0"],"last_affected":[],"package":"mailman-debugsource","purl":"pkg:rpm/redhat/mailman-debugsource","source":"RHSA-2020:4667"},{"ecosystem":"SUSE:Linux Enterprise Point of Sale 11 SP3","fixed":["2.1.15-9.6.20.1"],"introduced":["0"],"last_affected":[],"package":"mailman","purl":"pkg:rpm/suse/mailman\u0026distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3","source":"SUSE-SU-2020:14356-1"},{"ecosystem":"SUSE:Linux Enterprise Server 11 SP4-LTSS","fixed":["2.1.15-9.6.20.1"],"introduced":["0"],"last_affected":[],"package":"mailman","purl":"pkg:rpm/suse/mailman\u0026distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS","source":"SUSE-SU-2020:14356-1"}],"prev":{"headline":"Integer overflow in n/a","id":"CVE-2020-12135"},"products":["n/a"],"published":"2020-04-24","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":"An attacker can execute arbitrary JavaScript in the context of list-archive visitors by exploiting MIME sniffing issues in GNU Mailman.","url":"https://insights.sbomify.com/CVE-2020-12137/"}