HOME VULNERABILITIESCVE-2020-15692

CRITICAL

CVE-2020-15692

CWE-88Published: August 14, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

Technical Analysis

CVE-2020-15692 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

nim-lang1 product(s)

nim

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/browsers.nim#L48

PATCHhttps://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/browsers.nim#L48

ADVISORYhttp://www.openwall.com/lists/oss-security/2021/02/04/1

ADVISORYhttps://consensys.net/diligence/vulnerabilities/nim-browsers-argument-injection/

ADVISORYhttps://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html

ADVISORYhttp://www.openwall.com/lists/oss-security/2021/02/04/1

ADVISORYhttps://consensys.net/diligence/vulnerabilities/nim-browsers-argument-injection/

ADVISORYhttps://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html

All References (8)

→

http://www.openwall.com/lists/oss-security/2021/02/04/1Exploit · Mailing List · Third Party Advisory

→

https://consensys.net/diligence/vulnerabilities/nim-browsers-argument-injection/Exploit · Third Party Advisory

→

https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/browsers.nim#L48Patch · Third Party Advisory

→

https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.htmlRelease Notes · Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2021/02/04/1Exploit · Mailing List · Third Party Advisory

→

https://consensys.net/diligence/vulnerabilities/nim-browsers-argument-injection/Exploit · Third Party Advisory

→

https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/browsers.nim#L48Patch · Third Party Advisory

→

https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.htmlRelease Notes · Third Party Advisory

Quick Facts

CVE IDCVE-2020-15692

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-88

CISA KEVNo

Affected1 vendor(s)

PublishedAug 14, 2020

Related CVEs (CWE-88)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2020-15692 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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