RCE in Rubyonrails Thor

CVE-2025-54314

Thor before 1.4.0 can construct an unsafe shell command from library input. NOTE: this is disputed by the Supplier because "the method that was fixed can only be used with arguments that are controlled by Thor, and there is no way an attacker can take control of those arguments."

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 2.8 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-54314: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-54314?
CVE-2025-54314 is a low-severity vulnerability in Rubyonrails Thor, classified under OS Command Injection. CVSS score: 2.8/10. Published 2025-07-20.
How severe is CVE-2025-54314?
Low severity. CVSS v3 base score is 2.8 out of 10.