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CVE-2021-33473

30
FAUCET Score

CVE-2021-33473 is a critical argument injection vulnerability in Dragonfly Ruby Gem v1.3.0, allowing unauthenticated attackers to read and write arbitrary files through a crafted URL when the verify_url option is disabled. With a CVSS score of 9.1 (CRITICAL), this vulnerability has a low attack complexity and can lead to complete confidentiality and integrity compromise. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.0CPE matchmatch criteria
cpe:2.3:a:dragonfly_project:dragonfly:1.3.0:*:*:*:*:ruby:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.06%
Probability of exploitation in next 30 days
EPSS Percentile
61.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 46th percentile among its peer group of 36,897 CVEs.

Social Chatter

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.

Media 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.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: dragonflyFixed in: 1.4.0

Vendor Advisories (1)

rubygemsGHSA-fj34-jhjx-xmvvcritical

Arbitrary file write in dragonfly

Jun 3, 2022

References

github.com / markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255b111b5
PatchThird Party Advisory
github.com / markevans/dragonfly/issues/513
Issue TrackingThird Party Advisory
security.netapp.com / advisory/ntap-20220715-0004
Third Party Advisory