Vulnerabilities in pkg:npm/@seafile/sdoc-editor

PACKAGE
Advisory Identifier: GHSA-rqj3-x344-qvxc
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Advisory Summary

CVE-2026-30587 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting @seafile/sdoc editor libraries in the npm ecosystem. The issue involves seafile server has multiple stored xss vulnerabilities. Remediation is available by upgrading affected packages to version 3.0.75, 2.0.209.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/@seafile/sdoc-editor

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/@seafile/sdoc-editor. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-rqj3-x344-qvxc CVE-2026-30587 MODERATE Seafile Server has multiple stored XSS vulnerabilities

CVE-2026-30587 at a Glance

CVE Identifier CVE-2026-30587
GHSA Identifier GHSA-rqj3-x344-qvxc
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product @seafile/sdoc editor
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-30587

To remediate this vulnerability, upgrade all affected @seafile/sdoc editor dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

@seafile/sdoc-editor fixed: 3.0.75 
npm install @seafile/sdoc-editor@3.0.75
@seafile/sdoc-editor fixed: 2.0.209 
npm install @seafile/sdoc-editor@2.0.209
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls @seafile/sdoc-editor

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-30587, inspect your project dependencies using npm:

npm ls @seafile/sdoc-editor

Analyze the terminal output to locate any version of @seafile/sdoc editor in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.0.75), your application is affected.

Note: The npm ls @seafile/sdoc-editor command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In @seafile/sdoc editor, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-30587 Affected @seafile/sdoc editor Versions

2 component(s)
Fixed Versions:
3.0.752.0.209
Product / Package Ecosystem Affected Versions Fixed Version
@seafile/sdoc-editor
npm/@seafile/sdoc-editor
npm
≥ 3.0.0
< 3.0.75
3.0.75
@seafile/sdoc-editor
npm/@seafile/sdoc-editor
npm
< 2.0.209
2.0.209

References

NVD — CVE-2026-30587 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30587
Security Fix Commit FIX COMMIT
https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2
Security Fix Commit FIX COMMIT
https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987
@seafile/sdoc editor Source Repository REPOSITORY
https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f
@seafile/sdoc editor Source Repository REPOSITORY
https://github.com/haiwen/seadoc-editor
manual.seafile.com/12.0/changelog/chan... WEB
https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server
manual.seafile.com/13.0/changelog/chan... WEB
https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server
manual.seafile.com/13.0/changelog/serv... WEB
https://manual.seafile.com/13.0/changelog/server-changelog

Frequently Asked Questions

What is CVE-2026-30587?
CVE-2026-30587 is a security vulnerability in @seafile/sdoc editor involving Seafile Server has multiple stored XSS vulnerabilities under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which @seafile/sdoc editor versions are affected?
Affected versions include releases prior to 3.0.75, 2.0.209 across affected packages: @seafile/sdoc-editor.
What version fixes CVE-2026-30587?
Upgrading to 3.0.75, 2.0.209 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @seafile/sdoc-editor affected?
Yes, @seafile/sdoc-editor is affected in releases prior to 3.0.75, 2.0.209. Upgrade your dependency to 3.0.75, 2.0.209 or later.
What is the CVSS score of CVE-2026-30587?
CVE-2026-30587 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-30587?
CVE-2026-30587 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2026-30587?
Run the dependency tree command: 'npm ls @seafile/sdoc-editor'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-rqj3-x344-qvxc",
  "modified" : "2026-04-02T00:00:24Z",
  "published" : "2026-03-25T18:31:55Z",
  "aliases" : [ "CVE-2026-30587" ],
  "summary" : "Seafile Server has multiple stored XSS vulnerabilities",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@seafile/sdoc-editor"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.0.75"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@seafile/sdoc-editor"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.209"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-30587"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/haiwen/seadoc-editor"
  }, {
    "type" : "WEB",
    "url" : "https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server"
  }, {
    "type" : "WEB",
    "url" : "https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server"
  }, {
    "type" : "WEB",
    "url" : "https://manual.seafile.com/13.0/changelog/server-changelog"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-02T00:00:24Z",
    "nvd_published_at" : "2026-03-25T18:16:31Z"
  }
}