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CVE-2025-55346

45
FAUCET Score

CVE-2025-55346 is a critical vulnerability that allows unauthenticated network attackers to execute arbitrary, unsandboxed JavaScript code on a host by sending a simple POST request. This is due to user-controlled input flowing into an insecure dynamic Function constructor implementation. With a CVSS score of 9.8 (Critical), the vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating potential future interest.

Impacted Technologies

VendorProductVersion(s)CPE
Https://Www.Npmjs.ComFlowise
0CNA affected

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
18.45%
Probability of exploitation in next 30 days
EPSS Percentile
96.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1845 is in the 93rd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-hmgh-466j-fx4ccritical

Flowise vulnerable to RCE via Dynamic function constructor injection

Oct 6, 2025

References

research.jfrog.com / vulnerabilities/flowise-js-injection-remote-code-exection-jfsa-2025-001379925