nopoz 2f246c7779 fix(security): escape backslashes in calendar bg-image CSS url() (#4712)
* fix(security): escape backslashes in calendar bg-image CSS url()

The calendar event-background CSS escaped ' -> \' for a bg: image URL but
not backslashes first. Inside a single-quoted url('...'), \ is the CSS
escape char, so a URL value ending in/containing a backslash escapes the
closing quote and breaks out of the string, injecting arbitrary CSS. The
bg:<url> value is per-event and CalDAV-syncable, hence untrusted (CodeQL
js/incomplete-sanitization).

Add a single canonical _cssUrlEscape() in calendar/utils.js that escapes
backslashes FIRST, then quotes, and route all four sinks through it:
calendar.js:416 / :1263 (the flagged #463/#464), the event-form preview
(:2931), and _calBgCss() in utils.js — the latter two share the identical
bug but were unflagged. Output is byte-identical to the old escaping for
legitimate URLs (which contain no backslashes); only malicious input differs.

Resolves CodeQL js/incomplete-sanitization #463, #464.

* fix(security): route remaining calendar bg url() sinks through _cssUrlEscape

Review (vdmkenny) flagged that the centralization missed an injectable
sibling sink: the edit-form color-picker swatch (calendar.js:2856) built
`url('${url}')` from `existing.color` (a CalDAV-syncable, untrusted `bg:`
value) raw, then interpolated it into `style="background:..."` via innerHTML
- the same `'`/`\` breakout class as the sinks already fixed. The custom-dot
preview (:2953) was likewise raw (non-exploitable - a CSSOM `.style`
assignment of a URL the current user just picked - but it broke the invariant).

Route both through `_cssUrlEscape`, and normalize the two pre-escaped-variable
sites (_calItemBgStyle, _renderWeek) to the same inline form so all five
url() interpolations in calendar.js follow one rule. Add a whole-file
invariant test asserting every `url('${...}')` calls `_cssUrlEscape` - this
catches a future missed sink, the exact failure mode here. Behavior-identical
for legitimate URLs (no visual change).
2026-06-22 21:17:52 +02:00
2026-06-21 11:08:50 +00:00
2026-06-15 16:00:13 +09:00
2026-06-21 11:08:50 +00:00
2026-06-22 04:54:15 +00:00

Odysseus

A self-hosted AI workspace for chat, agents, research, documents, email, notes, calendar, and local model workflows.

Quick Start · Setup Guide · Contributing · Roadmap

Packaging status

Odysseus interface


Quick Start

dev is the default branch and gets the newest changes first. Use main if you want the more curated branch.

git clone https://github.com/pewdiepie-archdaemon/odysseus.git
cd odysseus
cp .env.example .env
docker compose up -d --build

Open http://localhost:7000 when the containers are healthy. The first admin password is printed in docker compose logs odysseus.

Native installs, GPU notes, Windows/macOS instructions, HTTPS, and configuration live in the setup guide.

Features

  • Chat + Agents — local/API models, tools, MCP, files, shell, skills, and memory.
  • Cookbook — hardware-aware model recommendations, downloads, and serving.
  • Deep Research — multi-step web research with source reading and report generation.
  • Compare — blind side-by-side model testing and synthesis.
  • Documents — writing-first editor with AI edits, suggestions, Markdown, HTML, CSV, and syntax highlighting.
  • Email — IMAP/SMTP inbox with triage, tags, summaries, reminders, and reply drafts.
  • Notes, Tasks + Calendar — reminders, todos, scheduled agent tasks, and CalDAV sync.
  • Extras — gallery/image editor, themes, uploads, web search, presets, sessions, and 2FA.

Demo

A full hover-to-play tour lives on the landing page: docs/index.html.

Contributing

Help is welcome. The best entry points are fresh-install testing, provider setup bugs, mobile/editor polish, docs, and small focused refactors. See CONTRIBUTING.md and ROADMAP.md.

Security

Odysseus is a self-hosted workspace with powerful local tools. Keep auth enabled, keep private data out of Git, and do not expose raw model/service ports publicly. Deployment details are in the setup guide.

Star History

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License

AGPL-3.0-or-later -- see LICENSE and ACKNOWLEDGMENTS.md.

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JavaScript 39.5%
CSS 8.2%
HTML 1.8%
Shell 0.4%