CVE-2025-71331: medium-severity vulnerability in Flowise
Flowise - Cross-Site Scripting in Chat Messages and Agent Workflows
Published · Updated
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.1epss 0.3%
exploitation probability
0.3%top 76% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Affected products
Flowise · FlowiseRelated CVEs — Flowise
In the same product, most dangerous first.
CVE-2026-56274HIGHFlowise - Remote Code Execution via MCP Security Bypass in validateCommandFlags and validateArgsForLocalFileAccessEPSS 7.5%CVE-2025-71334CRITICALFlowise - Arbitrary File Access via Missing Chat Flow ID ValidationEPSS 4.4%CVE-2026-56270HIGHFlowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod EndpointEPSS 2.0%CVE-2025-71324HIGHFlowise - Arbitrary File Read via chatId ParameterEPSS 1.6%CVE-2026-58057LOWFlowise - Custom MCP Environment Variable Denylist Bypass via Case SensitivityEPSS 1.6%CVE-2025-71338CRITICALFlowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store APIEPSS 1.2%