CVE-2026-73037: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in DayuanJiang next-ai-draw-io
Next AI Draw.io versions 0.2.1 through 0.4.16 contain a reflected cross-site scripting (XSS) vulnerability in the mcp query parameter. This parameter is improperly neutralized and directly injected into HTML and JavaScript contexts, allowing attackers to execute arbitrary scripts in the localhost origin. Such exploitation could lead to exfiltration of diagram sessions and API data. The vulnerability has a medium severity rating with a CVSS score of 5.1. No official patch or remediation guidance is currently available.
AI Analysis
Technical Summary
CVE-2026-73037 identifies a reflected cross-site scripting vulnerability in DayuanJiang's Next AI Draw.io product, affecting versions 0.2.1 through 0.4.16. The flaw exists because the mcp query parameter is interpolated into HTML and JavaScript without proper escaping or neutralization. This allows attackers to craft malicious URLs that execute arbitrary JavaScript within the localhost origin context, potentially exposing sensitive diagram session data and API information. The vulnerability is rated medium severity with a CVSS 4.0 score of 5.1. No vendor advisory or patch information is provided, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation enables arbitrary JavaScript execution in the context of the localhost origin, which can lead to unauthorized access and exfiltration of diagram sessions and API data. This compromises confidentiality and integrity of user data handled by the affected application versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid clicking untrusted links containing the mcp query parameter or restrict access to the affected application to trusted users only.
CVE-2026-73037: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in DayuanJiang next-ai-draw-io
Description
Next AI Draw.io versions 0.2.1 through 0.4.16 contain a reflected cross-site scripting (XSS) vulnerability in the mcp query parameter. This parameter is improperly neutralized and directly injected into HTML and JavaScript contexts, allowing attackers to execute arbitrary scripts in the localhost origin. Such exploitation could lead to exfiltration of diagram sessions and API data. The vulnerability has a medium severity rating with a CVSS score of 5.1. No official patch or remediation guidance is currently available.
CVSS v4.0
Score 5.1medium
Affected software
pkg:github/next-ai-draw-ioRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73037 identifies a reflected cross-site scripting vulnerability in DayuanJiang's Next AI Draw.io product, affecting versions 0.2.1 through 0.4.16. The flaw exists because the mcp query parameter is interpolated into HTML and JavaScript without proper escaping or neutralization. This allows attackers to craft malicious URLs that execute arbitrary JavaScript within the localhost origin context, potentially exposing sensitive diagram session data and API information. The vulnerability is rated medium severity with a CVSS 4.0 score of 5.1. No vendor advisory or patch information is provided, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation enables arbitrary JavaScript execution in the context of the localhost origin, which can lead to unauthorized access and exfiltration of diagram sessions and API data. This compromises confidentiality and integrity of user data handled by the affected application versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid clicking untrusted links containing the mcp query parameter or restrict access to the affected application to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-10T18:48:59.023Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7e0ff3bf8831d539a34e50
Added to database: 08/13/2026, 18:41:55 UTC
Last enriched: 08/13/2026, 19:00:28 UTC
Last updated: 08/13/2026, 22:03:30 UTC
Views: 6
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