{"cve":"CVE-2021-33564","nvd":{"published":"2021-05-29T14:15:08.510","modified":"2026-06-17T03:54:48.360","status":"Modified","description":"An argument injection vulnerability in the Dragonfly gem before 1.4.0 for Ruby allows remote attackers to read and write to arbitrary files via a crafted URL when the verify_url option is disabled. This may lead to code execution. The problem occurs because the generate and process features mishandle use of the ImageMagick convert utility.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-88"],"references":["https://github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255b111b5","https://github.com/markevans/dragonfly/compare/v1.3.0...v1.4.0","https://github.com/markevans/dragonfly/issues/513","https://github.com/mlr0p/CVE-2021-33564","https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/master/cves/2021/CVE-2021-33564.yaml"],"products":["dragonfly_project:dragonfly"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-33564","score":0.72143,"percentile":0.99432,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-j858-xp5v-f8xx","url":"https://osv.dev/vulnerability/GHSA-j858-xp5v-f8xx","summary":"Dragonfly contains remote code execution vulnerability","modified":"2024-02-16T08:14:53.365593Z","packages":[{"ecosystem":"RubyGems","name":"dragonfly","purl":"pkg:gem/dragonfly","ranges":["<1.4.0"],"fixed":["1.4.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}