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CVE-2017-16031

24
FAUCET Score

CVE-2017-16031 describes a predictability vulnerability in Socket.io versions 0.9.6 and earlier, where the use of Math.random() for generating socket IDs makes them guessable, affecting the socket and socket.io products. This high-severity vulnerability (CVSS 7.5) allows unauthenticated remote attackers to gain unauthorized access to Socket.io servers, potentially leading to sensitive information disclosure. There is no evidence of active exploitation, and no public exploit code or significant community discussion has been identified for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.6CPE matchmatch criteria
cpe:2.3:a:socket:socket.io:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.00%
Probability of exploitation in next 30 days
EPSS Percentile
78.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0200 is in the 62nd percentile among its peer group of 51,466 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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: socket.ioFixed in: 0.9.7

Vendor Advisories (1)

npmGHSA-qv2v-m59f-v5fwhigh

Insecure randomness in socket.io

Nov 7, 2018

References

github.com / socketio/socket.io/commit/67b4eb9abdf111dfa9be4176d1709374a2b4ded8
Issue TrackingPatchThird Party Advisory
github.com / socketio/socket.io/issues/856
Issue TrackingThird Party Advisory
github.com / socketio/socket.io/pull/857
Issue TrackingThird Party Advisory
nodesecurity.io / advisories/321
Third Party Advisory