PatchTheCVECVE-2024-28121: stimulus_reflex is a system to extend the capabilities of both Rails and Stimulus by intercepting user interac
CVE-2024-28121 is a high-severity flaw (CVSS 8.8) affecting stimulusrelfex. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.6% (top 25%) |
| CISA exploited list | No |
| Weakness | CWE-470 |
| Published | 2024-03-12 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-28121?
stimulusrelfex: upgrade to 3.4.2. Exact commands for each OS are on this page.
Is CVE-2024-28121 being exploited?
CVE-2024-28121 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-28121 affect?
CVE-2024-28121 affects stimulusrelfex. Severity is high (CVSS 8.8). 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
How urgent is CVE-2024-28121?
Priority 55/100. High severity; Public exploit reference