What’s Vulnerable › Vulnerabilities

CVE-2020-15692

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-08-14 · updated 2026-06-17
• Weakness: CWE-88

Description

In Nim 1.2.4, the standard library browsers mishandles the URL argument to browsers.openDefaultBrowser. This argument can be a local file path that will be opened in the default explorer. An attacker can pass one argument to the underlying open command to execute arbitrary registered system commands.

Affected products

• nim-lang Nim: through 1.2.6

References

• http://www.openwall.com/lists/oss-security/2021/02/04/1
• https://consensys.net/diligence/vulnerabilities/nim-browsers-argument-injection/
• https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/browsers.nim#L48
• https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html
• http://www.openwall.com/lists/oss-security/2021/02/04/1
• https://consensys.net/diligence/vulnerabilities/nim-browsers-argument-injection/
• https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/browsers.nim#L48
• https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html

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