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CVE-2017-20162

20
FAUCET Score

CVE-2017-20162 is a problematic vulnerability affecting vercel ms versions up to 1.x, specifically within the parse function of the index.js file. This flaw, categorized as inefficient regular expression complexity (CWE-1333), allows for remote attacks by manipulating the 'str' argument. The vulnerability has a CVSS score of 5.3 (Medium), indicating a low impact on availability (A:L) with no impact on confidentiality or integrity. It can be exploited over the network with low attack complexity and no user interaction required. While the exploit has been publicly disclosed, there is no evidence of active exploitation, Metasploit modules, or ExploitDB entries. Community discussion and media coverage are minimal, suggesting low public awareness. Upgrading to vercel ms version 2.0.0 addresses this issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.0CPE matchmatch criteria
cpe:2.3:a:vercel:ms:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 37th percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media 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

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: msFixed in: 2.0.0

Vendor Advisories (1)

npmGHSA-w9mr-4mfr-499fmedium

Vercel ms Inefficient Regular Expression Complexity vulnerability

Jan 5, 2023

References

security.netapp.com / advisory/ntap-20241108-0002
github.com / vercel/ms/commit/caae2988ba2a37765d055c4eee63d383320ee662
Patch
github.com / vercel/ms/pull/89
ExploitIssue TrackingPatch
github.com / vercel/ms/releases/tag/2.0.0
PatchRelease Notes
vuldb.com
Permissions RequiredThird Party Advisory
vuldb.com
Permissions RequiredThird Party Advisory