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.
References
Configurations
Configuration 1 (hide)
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History
03 Dec 2025, 17:13
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Stimulusreflex
Stimulusreflex stimulusrelfex |
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| References | () http://seclists.org/fulldisclosure/2024/Mar/16 - Exploit, Third Party Advisory | |
| References | () https://github.com/stimulusreflex/stimulus_reflex/blob/0211cad7d60fe96838587f159d657e44cee51b9b/app/channels/stimulus_reflex/channel.rb#L83 - Technical Description | |
| References | () https://github.com/stimulusreflex/stimulus_reflex/commit/538582d240439aab76066c72335ea92096cd0c7f - Patch | |
| References | () https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.4.2 - Product, Release Notes | |
| References | () https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.5.0.rc4 - Product, Release Notes | |
| References | () https://github.com/stimulusreflex/stimulus_reflex/security/advisories/GHSA-f78j-4w3g-4q65 - Vendor Advisory, Exploit | |
| CPE | cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre9:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre7:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:rc3:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:rc2:*:*:*:*:*:* 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:pre10:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre2:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre8:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre3:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:*:*:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:rc1:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre1:*:*:*:*:*:* cpe:2.3:a:stimulusreflex:stimulusrelfex:3.5.0:pre6:*:*:*:*:*:* |
Information
Published : 2024-03-12 20:15
Updated : 2025-12-03 17:13
NVD link : CVE-2024-28121
Mitre link : CVE-2024-28121
CVE.ORG link : CVE-2024-28121
JSON object : View
Products Affected
stimulusreflex
- stimulusrelfex
CWE
CWE-470
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
