What is CVE-2025-50538?

CVE-2025-50538 is a high-severity vulnerability in Flowiseai Flowise, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2025-10-06.

How severe is CVE-2025-50538?

High severity. CVSS v3 base score is 8.2 out of 10.

Is CVE-2025-50538 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Flowiseai Flowise

CVE-2025-50538

Flowise before 3.0.5 allows XSS via an IFRAME element when an admin views the chat log.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (28.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.

Affected products

Flowiseai Flowise — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

github.com/FlowiseAI/Flowise/security/advisories/GHSA-964p-j4gg-mhwc
github.com/FlowiseAI/Flowise/pull/4905
github.com/FlowiseAI/Flowise/releases/tag/flowise@3.0.5

Frequently asked questions

What is CVE-2025-50538?: CVE-2025-50538 is a high-severity vulnerability in Flowiseai Flowise, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2025-10-06.
How severe is CVE-2025-50538?: High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2025-50538 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.