CVE-2026-33978
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
62/100
Published: 2026-04-01
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
Scope Change
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Required
S:
Changed
C:
Low
I:
Low
A:
None
Description
Notesnook is a note-taking app focused on user privacy & ease of use. Prior to version 3.3.17, a stored XSS vulnerability exists in the mobile share / web clip flow because attacker-controlled clip metadata is concatenated into HTML without escaping and then rendered with innerHTML inside the mobile share editor WebView. An attacker can control the shared title metadata (for example through Android/iOS share metadata such as TITLE / SUBJECT, or through link-preview title data) and inject HTML such as </a><img src=x onerror=...>. When the victim opens the Notesnook share flow and selects Web clip, the payload is inserted into the generated HTML and executed in the mobile editor WebView. This issue has been patched in version 3.3.17.
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| streetwriters | notesnook_mobile | < 3.3.17 |
| streetwriters | notesnook_mobile | < 3.3.17 |
References & Advisories (3)
Release Notes
Patch
Exploit
Vendor Advisory