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CVE-2025-66902

27
FAUCET Score

CVE-2025-66902 is an input validation vulnerability in Pithikos websocket-server v.0.6.4, specifically within the websocket_server/websocket_server.py and WebSocketServer._message_received components. This flaw allows an unauthenticated remote attacker to obtain sensitive information or cause unexpected server behavior. With a CVSS score of 7.5 (HIGH), it has a low attack complexity and requires no user interaction, posing a significant risk of confidentiality impact. While there is no evidence of active exploitation, public exploit code, or inclusion in CISA's KEV catalog, the vulnerability has garnered substantial community discussion, indicating potential future interest.

Impacted Technologies

VendorProductVersion(s)CPE
0.6.4CPE matchmatch criteria
cpe:2.3:a:pithikos:websocket_server:0.6.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 9th percentile among its peer group of 51,553 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

Remediation records are not available for this CVE.

References

github.com / cyberinvest211/websocket-server-vuln-poc/tree/main
ExploitThird Party Advisory