CVE-2024-28121

Reflex arbitrary method call in stimulus_reflex

Published Mar 12, 2024 CVSS 3.1 · 8.8 High EPSS 1.6% KEV · Not listed
Description
stimulus_reflex is a system to extend the capabilities of both Rails and Stimulus by intercepting user interactions and passing them to Rails over real-time websockets. In affected versions more methods than expected can be called on reflex instances. Being able to call some of them has security implications. To invoke a reflex a websocket message of the following shape is sent: `\"target\":\"[class_name]#[method_name]\",\"args\":[]`. The server will proceed to instantiate `reflex` using the provided `class_name` as long as it extends `StimulusReflex::Reflex`. It then attempts to call `method_name` on the instance with the provided arguments. This is problematic as `reflex.method method_name` can be more methods that those explicitly specified by the developer in their reflex class. A good example is the instance_variable_set method. This vulnerability has been patched in versions 3.4.2 and 3.5.0.rc4. Users unable to upgrade should: see the backing GHSA advisory for mitigation advice.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-0913 stimulus_reflex is a system to extend the capabilities of both Rails and Stimulus by intercepting user interactions and passing them to Rails over real-time websockets. In affected versions more methods than expected can be called on reflex instances. Being able to call some of them has security implications. To invoke a reflex a websocket message of the following shape is sent: `\"target\":\"[class_name]#[method_name]\",\"args\":[]`. The server will proceed to instantiate `reflex` using the provided `class_name` as long as it extends `StimulusReflex::Reflex`. It then attempts to call `method_name` on the instance with the provided arguments. This is problematic as `reflex.method method_name` can be more methods that those explicitly specified by the developer in their reflex class. A good example is the instance_variable_set method. This vulnerability has been patched in versions 3.4.2 and 3.5.0.rc4. Users unable to upgrade should: see the backing GHSA advisory for mitigation advice.
Github GHSA Github GHSA GHSA-f78j-4w3g-4q65 StimulusReflex arbitrary method call
History
Type Values Removed Values Added
First Time appeared Stimulusreflex
Stimulusreflex stimulusrelfex
CPEs cpe:2.3:a:stimulusreflex:stimulusrelfex:*:*:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre10:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre1:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre2:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre3:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre4:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre5:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre6:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre7:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre8:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre9:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:rc2:*:*:*:*:*:*
cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:rc3:*:*:*:*:*:*
Vendors & Products Stimulusreflex
Stimulusreflex stimulusrelfex
Type Values Removed Values Added
Title Reflex arbitrary method call in stimulus_reflex Reflex arbitrary method call in stimulus_reflex
Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Feb 13, 2025, 5:47 PM
Reserved
Mar 4, 2024, 2:19 PM
Status
Analyzed
Published
Mar 12, 2024, 8:15 PM
Modified
Jun 17, 2026, 7:21 AM