Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-21305

32
FAUCET Score

CVE-2021-21305 is a code injection vulnerability in the CarrierWave RubyGem (versions prior to 1.3.2 and 2.1.1) that allows remote code execution (RCE). It affects the carrierwave_project carrierwave product. This vulnerability is rated as HIGH severity (CVSS 8.8), indicating that an attacker can achieve high impact on confidentiality, integrity, and availability with low attack complexity, requiring only low privileges and no user interaction. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.2CPE matchmatch criteria
cpe:2.3:a:carrierwave_project:carrierwave:*:*:*:*:*:ruby:*:*
>= 2.0.1, < 2.1.1CPE matchmatch criteria
cpe:2.3:a:carrierwave_project:carrierwave:*:*:*:*:*:ruby:*:*

CVSS Data

CVSS version used by this source: 3.1

7.4HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.1
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
12.68%
Probability of exploitation in next 30 days
EPSS Percentile
95.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1268 is in the 95th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: carrierwaveFixed in: 1.3.2
rubygemspatch availablevia ghsa
Product: carrierwaveFixed in: 2.1.1

Vendor Advisories (1)

rubygemsGHSA-cf3w-g86h-35x4high

Code Injection vulnerability in CarrierWave::RMagick

Feb 8, 2021

References

github.com / carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md
Release NotesThird Party Advisory
github.com / carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md
Release NotesThird Party Advisory
github.com / carrierwaveuploader/carrierwave/commit/387116f5c72efa42bc3938d946b4c8d2f22181b7
PatchThird Party Advisory
github.com / carrierwaveuploader/carrierwave/security/advisories/GHSA-cf3w-g86h-35x4
ExploitThird Party Advisory
rubygems.org / gems/carrierwave
ProductThird Party Advisory