CVE-2026-42157

Flowsint: Stored XSS on map node marker in map page

MEDIUM

5.1

CVSS Score

Published: May 12, 2026 at 10:58 PM UTC

Updated: October 26, 2026 at 06:10 PM UTC

1 product affected across 1 vendorFlowsint

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Severity

MEDIUM5.1

Exploit prediction

EPSS 0.3%

SSVC

PoC

Description

Flowsint is an open-source OSINT graph exploration tool designed for cybersecurity investigation, transparency, and verification. Prior to 1.2.3, a remote attacker can create a map node with a malicious label that contains arbitrary HTML. When the map tab is selected and a map node marker is selected, it will render the arbitrary HTML, potentially triggering stored XSS. This vulnerability is fixed in 1.2.3.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Flowsint · Reconurge

90%

v < 1.2.3

Affected range stops below 1.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

https://github.com/reconurge/flowsint/security/advisories/GHSA-gj93-2vcq-729w

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.1MEDIUMGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-79

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