| Title | sheshbabu zen latest Improper Neutralization of Alternate XSS Syntax |
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| Description | Zen is vulnerable to two stored cross-site scripting (XSS) vectors that allow an authenticated user to execute arbitrary JavaScript under the application origin.
Note titles and SQLite FTS5 search-highlight fields are both rendered into the DOM through Preact’s dangerouslySetInnerHTML without any HTML encoding. A payload stored via note create/update or .md import executes when the note editor mounts (title sink) or when the note matches a search query (search sink). The Markdown body path is not affected - renderMarkdown uses markdown-it with the default html: false, which escapes raw HTML; only the non-Markdown title and search-highlight code paths are vulnerable. Because the session_token cookie is script-readable, either vector is sufficient to hijack the victim’s session and take over the account. |
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| Source | ⚠️ https://ctf-n0el4kls.notion.site/Store-XSS-in-sheshbabu-zen-3ae41990f44780dbadb6e6af57e6f833 |
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| User | n0el4kls (UID 80089) |
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| Submission | 07/31/2026 08:47 (2 months ago) |
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| Moderation | 09/25/2026 10:24 (2 months later) |
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| Status | Accepted |
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| VulDB entry | 409884 [sheshbabu zen up to 1.5.0 Note Editor NotesEditor.jsx dangerouslySetInnerHTML cross site scripting] |
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| Points | 17 |
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