CVE-2026-30587
Seafile Server Stored XSS Vulnerability
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
INFO
Published Date :
March 25, 2026, 6:16 p.m.
Last Modified :
March 31, 2026, 6:56 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Seafile Server to version 13.0.17 or 12.0.20-pro.
- Apply security patches for affected versions.
- Sanitize WebSocket messages for document structure updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-30587.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-30587 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-30587
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-30587 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-30587 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 31, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Added CWE CWE-79 Added CPE Configuration OR *cpe:2.3:a:seafile:seafile_server:*:*:*:*:professional:*:*:* versions up to (excluding) 12.0.20 *cpe:2.3:a:seafile:seafile_server:13.0.15:*:*:*:community:*:*:* *cpe:2.3:a:seafile:seafile_server:13.0.16:*:*:*:professional:*:*:* Added Reference Type MITRE: https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f Types: Exploit, Third Party Advisory Added Reference Type MITRE: https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2 Types: Patch Added Reference Type MITRE: https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987 Types: Patch Added Reference Type MITRE: https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server/ Types: Release Notes Added Reference Type MITRE: https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server/ Types: Release Notes Added Reference Type MITRE: https://manual.seafile.com/13.0/changelog/server-changelog/ Types: Release Notes -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N -
New CVE Received by [email protected]
Mar. 25, 2026
Action Type Old Value New Value Added 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 Added Reference https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f Added Reference https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2 Added Reference https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987 Added Reference https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server/ Added Reference https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server/ Added Reference https://manual.seafile.com/13.0/changelog/server-changelog/