{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27736 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27736 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27736 is a medium-severity vulnerability in n/a, published on 22 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-27736 and fix it if it is affected.\n\nWhat it is: CVE-2021-27736 is a medium-severity vulnerability in n/a, published on 22 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-27736 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-2021-27736/ (Markdown: https://insights.sbomify.com/CVE-2021-27736/index.md)","id":"CVE-2021-27736","markdown":"https://insights.sbomify.com/CVE-2021-27736/index.md","name":"CVE-2021-27736","record":{"aliases":["GHSA-3jw3-99x8-h6xc"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Java SAML library","requires_auth":"low_privilege","summary":"An attacker can exploit unsafe XML parsing in the fusionauth-samlv2 library to perform XXE attacks, potentially reading sensitive data or causing denial of service.","user_interaction":"not_required","vuln_class":"xxe"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"saml_v2","vendor":"fusionauth"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-611","name":"Improper Restriction of XML External Entity Reference"}],"description":"FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xml.parsers.DocumentBuilderFactory unsafely.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"XML external entity in n/a","id":"CVE-2021-27736","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xxe","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Denial of service in Apache Traffic Server","id":"CVE-2021-27737"},"packages":[],"prev":{"headline":"Auth bypass in n/a","id":"CVE-2021-27734"},"products":["n/a"],"published":"2021-04-22","related":[],"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":["n/a"]},"summary":"An attacker can exploit unsafe XML parsing in the fusionauth-samlv2 library to perform XXE attacks, potentially reading sensitive data or causing denial of service.","url":"https://insights.sbomify.com/CVE-2021-27736/"}