CVE-2026-31876
MEDIUM5.4CVSS v3
—CVSS v2
0.04%
EPSS (exploit probability)
CWE-79CWE
Description
Notesnook is a note-taking app focused on user privacy & ease of use. Prior to 3.3.9, a Stored Cross-Site Scripting (XSS) vulnerability existed in Notesnook's editor embed component when rendering Twitter/X embed URLs. The tweetToEmbed() function in component.tsx interpolated the user-supplied URL directly into an HTML string without escaping, which was then assigned to the srcdoc attribute of an <iframe>. This vulnerability is fixed in 3.3.9.
CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Affected routers (1)
| Vendor | Model | Matched via | Affected versions | Fixed in | Patch? |
|---|---|---|---|---|---|
| Ubiquiti | Ubiquiti EdgeRouter X | — |
— | — | No |