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, 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

• CWE-79
• CWE-79

• https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2fExploit, Third Party Advisory
• https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2Patch
• https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987Patch
• https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server/Release Notes
• https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server/Release Notes
• https://manual.seafile.com/13.0/changelog/server-changelog/Release Notes

Published

Mar 25, 2026

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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