CVE-2025-24293

activestorage: Code injection in Active Storage when used in conjunction with the image_processing gem

Published Jan 30, 2026 CVSS 4.0 · 9.2 Critical EPSS 5.6% KEV · Not listed
Description
# Active Storage allowed transformation methods potentially unsafe

Active Storage attempts to prevent the use of potentially unsafe image
transformation methods and parameters by default.

The default allowed list contains three methods allow for the circumvention
of the safe defaults which enables potential command injection
vulnerabilities in cases where arbitrary user supplied input is accepted as
valid transformation methods or parameters.


Impact
------
This vulnerability impacts applications that use Active Storage with the image_processing processing gem in addition to mini_magick as the image processor.

Vulnerable code will look something similar to this:
```
<%= image_tag blob.variant(params[:t] => params[:v]) %>
```

Where the transformation method or its arguments are untrusted arbitrary input.

All users running an affected release should either upgrade or use one of the workarounds immediately.



Workarounds
-----------
Consuming user supplied input for image transformation methods or their parameters is unsupported behavior and should be considered dangerous.

Strict validation of user supplied methods and parameters should be performed
as well as having a strong [ImageMagick security
policy](https://imagemagick.org/script/security-policy.php) deployed.

Credits
-------

Thank you [lio346](https://hackerone.com/lio346) for reporting this!

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-4416-1 rails security update
Debian DSA Debian DSA DSA-6090-1 rails security update
EUVD EUVD EUVD-2025-29509 Active Storage allowed transformation methods that were potentially unsafe
Github GHSA Github GHSA GHSA-r4mg-4433-c7g3 Active Storage allowed transformation methods that were potentially unsafe
History
Type Values Removed Values Added
First Time appeared Rails
Rails activestorage
Vendors & Products Rails
Rails activestorage
Type Values Removed Values Added
Title activestorage: Code injection in Active Storage when used in conjunction with the image_processing gem
Weaknesses CWE-88
References
Metrics threat_severity

None

cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important

Type Values Removed Values Added
Weaknesses CWE-77
CWE-94
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description # Active Storage allowed transformation methods potentially unsafe Active Storage attempts to prevent the use of potentially unsafe image transformation methods and parameters by default. The default allowed list contains three methods allow for the circumvention of the safe defaults which enables potential command injection vulnerabilities in cases where arbitrary user supplied input is accepted as valid transformation methods or parameters. Impact ------ This vulnerability impacts applications that use Active Storage with the image_processing processing gem in addition to mini_magick as the image processor. Vulnerable code will look something similar to this: ``` <%= image_tag blob.variant(params[:t] => params[:v]) %> ``` Where the transformation method or its arguments are untrusted arbitrary input. All users running an affected release should either upgrade or use one of the workarounds immediately. Workarounds ----------- Consuming user supplied input for image transformation methods or their parameters is unsupported behavior and should be considered dangerous. Strict validation of user supplied methods and parameters should be performed as well as having a strong [ImageMagick security policy](https://imagemagick.org/script/security-policy.php) deployed. Credits ------- Thank you [lio346](https://hackerone.com/lio346) for reporting this!
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
hackerone
Published
Updated
Jul 15, 2026, 1:26 AM
Reserved
Jan 17, 2025, 1:00 AM
Status
Deferred
Published
Jan 30, 2026, 9:15 PM
Modified
Jul 15, 2026, 2:17 AM
Severity
Important
Public date
Jan 30, 2026, 8:11 PM