{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2021-27852 in the wild since at least 11 Apr 2022.","fix":"No fix has been published for CVE-2021-27852 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 2 May 2022.","what":"CVE-2021-27852 is a critical unsafe deserialization vulnerability in Checkbox Survey, published on 27 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-27852 and fix it if it is affected.\n\nWhat it is: CVE-2021-27852 is a critical unsafe deserialization vulnerability in Checkbox Survey, published on 27 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-27852 in the wild since at least 11 Apr 2022.\n\nAffected product: Checkbox Survey. 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-2021-27852/ (Markdown: https://insights.sbomify.com/CVE-2021-27852/index.md)","id":"CVE-2021-27852","markdown":"https://insights.sbomify.com/CVE-2021-27852/index.md","name":"CVE-2021-27852","record":{"aliases":["GHSA-xrx4-vq84-23w6"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Checkbox Survey","requires_auth":"none","summary":"An unauthenticated remote attacker can execute arbitrary code via unsafe deserialization in Checkbox Survey.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[{"product":"survey","vendor":"checkbox"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. This issue affects: Checkbox Survey versions prior to 7.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"exploited"},"has_fix":null,"headline":"Checkbox Survey Deserialization of Untrusted Data","id":"CVE-2021-27852","indexable":true,"kev":{"dateAdded":"2022-04-11","dueDate":"2022-05-02","knownRansomwareCampaignUse":"Unknown","product":"Checkbox Survey","requiredAction":"Versions 6 and earlier for this product are end-of-life and must be removed from agency networks. Versions 7 and later are not considered vulnerable.","vendorProject":"Checkbox","vulnerabilityName":"Checkbox Survey Deserialization of Untrusted Data Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers","id":"CVE-2021-27853"},"packages":[],"prev":{"headline":"Local privilege escalation in GNU Guix via guix-daemon and '--keep-failed'","id":"CVE-2021-27851"},"products":["Survey"],"published":"2021-05-27","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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-10-21","vendors":["Checkbox"]},"summary":"An unauthenticated remote attacker can execute arbitrary code via unsafe deserialization in Checkbox Survey.","url":"https://insights.sbomify.com/CVE-2021-27852/"}