CVE-2021-33564 is a critical argument injection vulnerability in the Dragonfly gem for Ruby, affecting versions prior to 1.4.0. This flaw allows unauthenticated remote attackers to achieve arbitrary file read/write and potentially remote code execution by crafting malicious URLs when the verify_url option is disabled. With a CVSS score of 9.8 (Critical) and an EPSS score indicating high exploitability, the vulnerability poses a significant risk due to its network-based attack vector and low complexity. While there is no evidence of active exploitation or public Metasploit/ExploitDB modules, Nuclei templates exist for detecting and exploiting this RCE, and the lack of social media or media coverage is typical for most CVEs.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.4.0CPE matchmatch criteria | cpe:2.3:a:dragonfly_project:dragonfly:*:*:*:*:*:ruby:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.