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I. Basic Information for CVE-2021-21373
Vulnerability Information
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Vulnerability Title
Nimble falls back to insecure http url when fetching packages
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 by default. In case of error it falls back to a non-TLS URL http://irclogs.nim-lang.org/packages.json. 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用不可信的源
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nimble 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nimble是开源的Nim编程语言的软件包管理器。 Nimble before versions 1.2.10 and 1.4.4 存在信任管理问题漏洞，攻击者可利用该漏洞可以传递一个修改过的包含恶意软件包的包列表。如果安装并使用了软件包，攻击将升级为不受信任的代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
nim-langsecurity < 1.2.10 -
II. Public POCs for CVE-2021-21373
#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6575 chars
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III. Intelligence Information for CVE-2021-21373
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IV. Related Vulnerabilities
Same product: security
Same vendor: nim-lang
Same weakness: CWE-348
V. Comments for CVE-2021-21373

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