# 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!

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4416 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4416-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     December 21, 2025                             https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : rails     Version        : 2:6.0.3.7+dfsg-2+deb11u4     CVE ID         : CVE-2025-24293 CVE-2025-55193     Debian Bug     : 1111106

    Multiple security issues were discovered in the Rails web framework     which could result in command injection or logging of unescaped ANSI     sequences.

    For Debian 11 bullseye, these problems have been fixed in version     2:6.0.3.7+dfsg-2+deb11u4.

    We recommend that you upgrade your rails packages.

    For the detailed security status of rails please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/rails

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6090 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6090-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     December 21, 2025                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : rails     CVE ID         : CVE-2025-24293 CVE-2025-55193

    Multiple security issues were discovered in the Rails web framework     which could result in command injection or logging of unescaped ANSI     sequences.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 2:6.1.7.10+dfsg-1~deb12u2.

    For the stable distribution (trixie), these problems have been fixed in     version 2:7.2.2.2+dfsg-2~deb13u1.

    We recommend that you upgrade your rails packages.

    For the detailed security status of rails please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/rails

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2025-6e5c27d218 advisory.

    Update to Ruby on Rails 8.0.3

    * Fix [CVE-2025-24293](https://discuss.rubyonrails.org/t/cve-2025-24293-active-storage-allowed-     transformation-methods-potentially-unsafe/89670): Active Storage allowed transformation methods     potentially unsafe
    * Fix [CVE-2025-55193](https://discuss.rubyonrails.org/t/cve-2025-55193-ansi-escape-injection-in-active-     record-logging/89669): ANSI escape injection in Active Record logging

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - # 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! (CVE-2025-24293)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - # 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! (CVE-2025-24293)

ID	Name	Product	Family	Severity
280081	Debian dla-4416 : rails - security update	Nessus	Debian Local Security Checks	critical
279494	Debian dsa-6090 : rails - security update	Nessus	Debian Local Security Checks	critical
269912	Fedora 44 : rubygem-actioncable / rubygem-actionmailbox / rubygem-actionmailer / etc (2025-6e5c27d218)	Nessus	Fedora Local Security Checks	medium
264902	Linux Distros Unpatched Vulnerability : CVE-2025-24293	Nessus	Misc.	critical
433351	SCA: security update for activestorage (GHSA-r4mg-4433-c7g3)	Tenable Cloud Security	SCA Checks	critical
433351	SCA: security update for activestorage (GHSA-r4mg-4433-c7g3)	Tenable Self-Hosted Container Security	SCA Checks	critical

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CVE-2025-24293

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