Name: CVE-2021-21374: Use of Less Trusted Source
Creator: Rapid7
Published: 2021-03-26T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-21374, CWE-348, CWE-349, CWE-599, CWE-295, CVSS 8.1, EPSS 0.00313

Nimble is a package manager for the Nim programming language. In Nim release versions before versions 1.2.10 and 1.4.4, "nimble refresh" fetches a list of Nimble packages over HTTPS without full verification of the SSL/TLS certificate due to the default setting of httpClient. An attacker able to perform MitM can deliver a modified package list containing malicious software packages. If the packages are installed and used the attack escalates to untrusted code execution.

CVSS Details

CVSS 3.1 Base Score: 8.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Arch Linux	—	Upgrade to the latest version of Arch Linux	Jul 11, 2025	Mar 26, 2021
Debian	—	Upgrade nim	Jul 30, 2024	Mar 26, 2021
Suse	—	Upgrade nim	Apr 27, 2021	Mar 26, 2021

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CVSS Details

Covered by Rapid7

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