{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-39207 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-39207 is a high-severity unsafe deserialization vulnerability in facebookresearch ParlAI, published on 10 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-39207 and fix it if it is affected.\n\nWhat it is: CVE-2021-39207 is a high-severity unsafe deserialization vulnerability in facebookresearch ParlAI, published on 10 Sep 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-2021-39207 in the wild and no public exploit code.\n\nAffected product: facebookresearch ParlAI. 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-2021-39207/ (Markdown: https://insights.sbomify.com/CVE-2021-39207/index.md)","id":"CVE-2021-39207","markdown":"https://insights.sbomify.com/CVE-2021-39207/index.md","name":"CVE-2021-39207","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"AI dialogue framework","requires_auth":"low_privilege","summary":"Attackers can execute arbitrary code via unsafe YAML deserialization in the ParlAI framework, requiring users to upgrade or use SafeLoader.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"parlai","vendor":"facebook"}],"cvss":{"score":8.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"parlai is a framework for training and evaluating AI models on a variety of openly available dialogue datasets. In affected versions the package is vulnerable to YAML deserialization attack caused by unsafe loading which leads to Arbitary code execution. This security bug is patched by avoiding unsafe loader users should update to version above v1.1.0. If upgrading is not possible then users can change the Loader used to SafeLoader as a workaround. See commit 507d066ef432ea27d3e201da08009872a2f37725 for details.","ecosystems":[],"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":"Deserialization of Untrusted Data in parlai","id":"CVE-2021-39207","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"WriteEntryToDirectory used for an archive extraction is vulnerable to partial path traversal.","id":"CVE-2021-39208"},"packages":[],"prev":{"headline":"Incorrect Authorization with specially crafted requests","id":"CVE-2021-39206"},"products":["ParlAI"],"published":"2021-09-10","related":[{"cvss_score":9.8,"headline":"Deserialization in ParlAI","id":"CVE-2021-24040","kev_date_added":null,"published":"2021-09-10"}],"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":["facebookresearch"]},"summary":"Attackers can execute arbitrary code via unsafe YAML deserialization in the ParlAI framework, requiring users to upgrade or use SafeLoader.","url":"https://insights.sbomify.com/CVE-2021-39207/"}