CVE-2021-39197 affects the better_errors Ruby gem, a development tool for Rails and Rack applications. The vulnerability stems from a lack of CSRF protection and improper Content-Type header enforcement, allowing cross-origin attacks in development environments. With a CVSS score of 8.8 (High), it presents a significant risk (C:H/I:H/A:H) due to its network-based attack vector and low attack complexity, requiring user interaction. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.8.0CPE matchmatch criteria | cpe:2.3:a:better_errors_project:better_errors:*:*:*:*:*:ruby:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.