CVE-2026-42157: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in reconurge flowsint
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.
AI Analysis
Technical Summary
Flowsint versions before 1.2.3 are vulnerable to stored XSS due to improper neutralization of input during web page generation. Specifically, malicious HTML can be injected into map node labels, which are rendered without sufficient sanitization when users interact with the map interface. This allows remote attackers with low privileges to execute arbitrary scripts in the context of the application UI. The vulnerability is identified as CWE-79 and has a CVSS 4.0 base score of 5.1, indicating medium severity. The issue is resolved in Flowsint 1.2.3.
Potential Impact
Exploitation of this vulnerability allows an attacker to execute arbitrary HTML and script code in the context of the Flowsint application UI when users view the malicious map node. This can lead to actions such as session hijacking, UI manipulation, or other client-side attacks within the application context. The attack requires user interaction (selecting the map tab and node marker) and low privileges to create malicious nodes. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in Flowsint version 1.2.3. Users and administrators should upgrade to version 1.2.3 or later to remediate this issue. No other official remediation or temporary fixes are documented. Patch status is confirmed by the vendor advisory stating the fix is included in version 1.2.3.
CVE-2026-42157: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in reconurge flowsint
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.
CVSS v4.0
Score 5.1medium
Affected software
pkg:github/reconurge/flowsintRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Flowsint versions before 1.2.3 are vulnerable to stored XSS due to improper neutralization of input during web page generation. Specifically, malicious HTML can be injected into map node labels, which are rendered without sufficient sanitization when users interact with the map interface. This allows remote attackers with low privileges to execute arbitrary scripts in the context of the application UI. The vulnerability is identified as CWE-79 and has a CVSS 4.0 base score of 5.1, indicating medium severity. The issue is resolved in Flowsint 1.2.3.
Potential Impact
Exploitation of this vulnerability allows an attacker to execute arbitrary HTML and script code in the context of the Flowsint application UI when users view the malicious map node. This can lead to actions such as session hijacking, UI manipulation, or other client-side attacks within the application context. The attack requires user interaction (selecting the map tab and node marker) and low privileges to create malicious nodes. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in Flowsint version 1.2.3. Users and administrators should upgrade to version 1.2.3 or later to remediate this issue. No other official remediation or temporary fixes are documented. Patch status is confirmed by the vendor advisory stating the fix is included in version 1.2.3.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-24T17:15:21.835Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a03d8cbcbff5d86103ec198
Added to database: 05/13/2026, 01:50:03 UTC
Last enriched: 05/20/2026, 18:24:24 UTC
Last updated: 07/07/2026, 10:33:23 UTC
Views: 67
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