CVE-2026-30587
High
Description
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
SeverityHigh
CVSS8.7
Exploit probability—
ProductSeafile Server
PublishedMar 25, 2026
First seenMar 25, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- seafile seafile_server12.0.20 or later
- @seafile/sdoc-editor3.0.75, 2.0.209 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| seafile seafile_server | v < 12.0.20, 13.0.15, 13.0.16 | 12.0.20 |
| @seafile/sdoc-editornpm | 3.0.0 ≤ v < 3.0.75, v < 2.0.209 | 3.0.75, 2.0.209 |
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