CVE Daily

CVE-2025-51691

Cross-Site Scripting (XSS) vulnerability found in MarkTwo commit e3a1d3f90cce4ea...

Medium CVSS 6.1

Overview

Cross-Site Scripting (XSS) vulnerability found in MarkTwo commit e3a1d3f90cce4ea9c26efcbbf3a1cbfb9dcdb298 (May 2025) allows a remote attacker to execute arbitrary code via a crafted script input to the editor interface. The application does not properly sanitize user-supplied Markdown before rendering it. Successful exploitation could lead to session hijacking, credential theft, or arbitrary client-side code execution in the context of the victim's browser.

CWE: CWE-79 Published: 2025-08-13T15:15:35.027
Risk analysis

This vulnerability is rated 🟡 MEDIUM.

  • CVSS: 6.1 (MEDIUM)
  • Detected tags: rce, xss (tag impact: VERY HIGH)

Recommended actions:

  • Patch/upgrade immediately (remote code execution).
  • Reduce exposure (WAF/segmentation), minimize attack surface.
  • Apply context-aware output encoding.
  • Enable Content-Security-Policy and HttpOnly/SameSite cookies.

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