Reference page — cumulative record through Thursday, August 20, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2025-71331

CVE-2025-71331MEDIUM

Flowise - Cross-Site Scripting in Chat Messages and Agent Workflows

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   A   N   N   N    5.1   .0022   13.0     —

AFFECTED
  Product  Versions     Fixed
  Flowise  unspecified  3.0.8

TIMELINE
  Jun 19  Reserved by VulnCheck
  Jun 20  EXPLOIT PUBLISHED — CVE-2025-71331 (Flowise). Public exploit reference added.
  Jun 20  Published (CNA: VulnCheck)

CWE-80 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

Flowise before 3.0.8 contains a cross-site scripting (XSS) vulnerability caused by insufficient input filtering in chat messages and custom agent functions. An attacker can inject malicious JavaScript by sending an iframe payload (e.g., <iframe src="javascript:alert(document.cookie)">) in a chat box, or by having a custom agent function return an XSS payload from an external website. The injected script executes in the victim's browser, enabling theft of cookies and session data.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 19, 2026	Reserved	Reserved by VulnCheck
June 20, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2025-71331 (Flowise). Public exploit reference added.
June 20, 2026	Published	Published (CNA: VulnCheck)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Flowise	Flowise	—	—	3.0.8

Weaknesses

CWE-80

References (2)

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4fr9-3x69-36wv [Exploit, Vendor Advisory]
https://www.vulncheck.com/advisories/flowise-cross-site-scripting-in-chat-messages-and-agent-workflows [Third Party Advisory]

Authoritative record: CVE-2025-71331 at cve.org

Vendors: flowise

Weaknesses: CWE-80

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-71331 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, August 20, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.