PT-2026-24783

CVE-2026-31876

Published

2026-03-11

Updated

2026-03-12

Description by

CVSS 3.1

5.4

Medium

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

Name of the Vulnerable Software and Affected Versions Notesnook versions prior to 3.3.9

Description A Stored Cross-Site Scripting (XSS) issue existed in Notesnook’s editor embed component when processing Twitter/X embed URLs. The tweetToEmbed() function within component.tsx directly incorporated user-provided URLs into an HTML string without proper escaping before assigning it to the srcdoc attribute of an <iframe>. This allowed for the injection of malicious scripts.

Recommendations Update Notesnook to version 3.3.9 or later.

Exploitability

Exploit

Fix

Impacts

Researchers

X4Sh3S

Vendors

Affected products

Weakness enumeration

CWE-79: Improper Neutralization of Input During Web Page Generation (\'Cross-site Scripting\')

Related identifiers