{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47838 exists.","fix":"No fix has been published for CVE-2021-47838 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47838 is a medium-severity cross-site scripting vulnerability in dvcrn Markright, published on 16 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-47838 and fix it if it is affected.\n\nWhat it is: CVE-2021-47838 is a medium-severity cross-site scripting vulnerability in dvcrn Markright, published on 16 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47838 exists.\n\nAffected product: dvcrn Markright. 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-2021-47838/ (Markdown: https://insights.sbomify.com/CVE-2021-47838/index.md)","id":"CVE-2021-47838","markdown":"https://insights.sbomify.com/CVE-2021-47838/index.md","name":"CVE-2021-47838","record":{"aliases":["GHSA-7g4v-c679-p2rh"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Markdown rendering library","requires_auth":"low_privilege","summary":"Attackers can inject malicious JavaScript into markdown files, leading to arbitrary code execution on victim systems when the files are rendered.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Markright 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to embed malicious payloads in markdown files. Attackers can upload specially crafted markdown files that execute arbitrary JavaScript when opened, potentially enabling remote code execution on the victim's system.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Markright 1.0 - Persistent Cross-Site Scripting","id":"CVE-2021-47838","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"Marky 0.0.1 - Persistent Cross-Site Scripting","id":"CVE-2021-47839"},"packages":[],"prev":{"headline":"Markdownify 1.2.0 - Persistent Cross-Site Scripting","id":"CVE-2021-47837"},"products":["Markright"],"published":"2026-01-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-01-16","vendors":["dvcrn"]},"summary":"Attackers can inject malicious JavaScript into markdown files, leading to arbitrary code execution on victim systems when the files are rendered.","url":"https://insights.sbomify.com/CVE-2021-47838/"}