CVE-2024-28121Reflex arbitrary method call in stimulus_reflex
- 8.8HighCVSS base score
- 1.6%Exploitation in 30 daysEPSS · top 24% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
- 8 days later
· 8 days later
Published
- 11 months later
· 11 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.6% · top 24% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
stimulusreflex · stimulus_reflex
- affected >= 3.5.0.rc1, < 3.5.0.rc4
- affected < 3.4.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- RubyGemsstimulus_reflexGHSA-f78j-4w3g-4q65 (opens in a new tab)
- npmstimulus_reflexGHSA-f78j-4w3g-4q65 (opens in a new tab)
References
References6
- https://github.com/stimulusreflex/stimulus_reflex/security/advisories/GHSA-f78j-4w3g-4q65 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/stimulusreflex/stimulus_reflex/commit/538582d240439aab76066c72335ea92096cd0c7f (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/stimulusreflex/stimulus_reflex/blob/0211cad7d60fe96838587f159d657e44cee51b9b/app/channels/stimulus_reflex/channel.rb#L83 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.4.2 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.5.0.rc4 (opens in a new tab)x_refsource_MISCx_transferred
- http://seclists.org/fulldisclosure/2024/Mar/16 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-0913 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-f78j-4w3g-4q65 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-28121)Record last updated .