CVE-2026-30587
8.7 · HIGHOverview
CVE-2026-30587 is a high-severity vulnerability affecting seafile seafile_server. It was published on March 25, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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
Remediation
Check the references section for vendor advisories and patches from seafile. Update seafile_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| seafile | seafile_server | >= 0, < 12.0.20 | Affected |
References
Frequently Asked Questions
What is CVE-2026-30587?
CVE-2026-30587 is a high-severity vulnerability affecting seafile seafile_server. It was published on March 25, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).
How severe is CVE-2026-30587?
This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-30587?
Check the references section for vendor advisories and patches from seafile. Update seafile_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-30587?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-30587 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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