CVE-2026-33978 identifies a stored Cross-Site Scripting (XSS) vulnerability in Notesnook versions prior to 3.3.17. This flaw allows an attacker to inject malicious HTML into the mobile share editor WebView by manipulating unescaped web clip title metadata, which executes when a victim opens a shared web clip. Rated with a CVSS score of 5.4 (Medium), exploitation requires user interaction and can lead to low impact on confidentiality and integrity. Currently, there is no evidence of active exploitation, public exploit code is unavailable, and community attention remains minimal.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.3.17CPE matchmatch criteria | cpe:2.3:a:streetwriters:notesnook_mobile:*:*:*:*:*:android:*:* | ||
< 3.3.17CPE matchmatch criteria | cpe:2.3:a:streetwriters:notesnook_mobile:*:*:*:*:*:iphone_os:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.