CVE-2025-71331: Flowise before 3.0.8 contains a cross-site scripting (XSS) vulnerability caused by insufficient input filterin

Q: How do I fix CVE-2025-71331?

flowise: upgrade to 3.0.8. Exact commands for each OS are on this page.

Q: Is CVE-2025-71331 being exploited?

CVE-2025-71331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-71331 affect?

CVE-2025-71331 affects flowise. Severity is medium (CVSS 6.1). 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., <if

Q: How urgent is CVE-2025-71331?

Priority 33/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2025-71331 is a medium-severity flaw (CVSS 6.1) affecting flowise. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-80
Published	2026-06-20
Last modified	2026-10-19

Publisher (CNA): VulnCheck · Vendor: flowiseai

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-20 16:17 UTCPublished CVE record published
2026-10-19 17:10 UTCUpdated Record last modified

flowiseai flowise UPGRADE

Affected: < 3.0.8

Fixed in: 3.0.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flowise || rpm -q flowise || flowise --version

2. UPGRADE to 3.0.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flowise

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flowise

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-71331?

flowise: upgrade to 3.0.8. Exact commands for each OS are on this page.

Is CVE-2025-71331 being exploited?

CVE-2025-71331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-71331 affect?

CVE-2025-71331 affects flowise. Severity is medium (CVSS 6.1). 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., <if

How urgent is CVE-2025-71331?

Priority 33/100. Public exploit reference

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References

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