PT-2025-32991 · Marktwo · Marktwo

Published 2025-08-13 · Updated 2025-08-13 · CVE-2025-51691

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: MarkTwo versions prior to commit e3a1d3f90cce4ea9c26efcbbf3a1cbfb9dcdb298 (May 2025)

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

Recommendations: Update to commit e3a1d3f90cce4ea9c26efcbbf3a1cbfb9dcdb298 (May 2025) or later to resolve this issue.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-51691

Affected Products

Marktwo

References · 7

• 🔥 https://github.com/0x72303074/CVE-Disclosures/tree/main/MarkTwo%20Markdown%20Editor/CVE-2025-51691 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-51691 · Security Note
• https://github.com/anthonygarvan/marktwo · Note
• https://twitter.com/CVEnew/status/1955658277548597736 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1955718596220321947 · Twitter Post
• https://t.me/CVEtracker/29893 · Telegram Post
• https://marktwo.app/try-it-now · Note