CVE-2021-21373 affects Nimble, the package manager for the Nim programming language, in versions prior to 1.2.10 and 1.4.4. The vulnerability stems from Nimble's fallback mechanism, which retrieves package lists over unencrypted HTTP if the primary HTTPS connection fails. This medium-severity vulnerability (CVSS 5.9) allows a Man-in-the-Middle attacker to inject malicious package lists, leading to untrusted code execution if installed. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.2.10CPE matchmatch criteria | cpe:2.3:a:nim-lang:nim:*:*:*:*:*:*:*:* | ||
>= 1.4.0, < 1.4.4CPE matchmatch criteria | cpe:2.3:a:nim-lang:nim:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.