Medium, CVSS 5.4npmAmendedPublished
Seafile Server has multiple stored XSS vulnerabilities
CVE-2026-30587 · GHSA-rqj3-x344-qvxc
- Affected
- npm @seafile/sdoc-editor >= 3.0.0, < 3.0.75; < 2.0.209
- Fixed in
- 2.0.2093.0.75· Vendor fix available
- Issue
- Multiple Stored XSS vulnerabilities exist in Seafile Server version 13.0.15,13.0.16-pro,12.0.14 and prior and fixed in 13.0.17, 13.0.17-pro, and 12.0.20-pro, via the Seadoc (sdoc) editor. The application fails to properly sanitize WebSocket messages regarding document structure updates. This allows authenticated remote attackers to inject malicious JavaScript payloads via the src attribute of embedded Excalidraw whiteboards or the href attribute of anchor tags.
Recommended action: Upgrade to 3.0.75 or 2.0.209 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.