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CVE-2021-21288

Server-side request forgery in CarrierWave

MEDIUM
4.3
CVSS Score
Published: February 8, 2021 at 07:15 PM UTC
Updated: June 17, 2026 at 03:35 AM UTC
2 products affected across 2 vendorsCarrierwaveProject Carrierwave

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Severity
MEDIUM4.3
Exploit prediction
EPSS 1%

Description

CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1 the download feature has an SSRF vulnerability, allowing attacks to provide DNS entries or IP addresses that are intended for internal use and gather information about the Intranet infrastructure of the platform. This is fixed in versions 1.3.2 and 2.1.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Carrierwave· Carrierwave Projectrubygems
95%
v < 1.3.22.0.1 ≤ v < 2.1.1
Affected range stops below 1.3.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.1.1, so it looks safe — our inference, not a vendor statement
Project Carrierwave· Carrierwaveuploaderrubygems
60%
v < 1.3.2v < 2.1.1
Affected range stops below 1.3.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (5)

x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132---2021-02-08
x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#211---2021-02-08
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/carrierwaveuploader/carrierwave/commit/012702eb3ba1663452aa025831caa304d1a665c0
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-fwcm-636p-68r5
x_refsource_MISCProductThird Party Advisory
Source: [email protected]
https://rubygems.org/gems/carrierwave/

CVSS

4.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-918

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