CVE-2026-30587

HIGHNVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity87% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

March 25, 2026

Last Modified

June 17, 2026

Advisory Details (6)

Auto-updated May 10, 2026
No patch confirmed yet.
generic

Seafile Community Edition - Seafile Admin Manual

https://manual.seafile.com/13.0/changelog/server-changelog/
generic

Seafile Professional Edition - Seafile Admin Manual

https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server/
generic

Seafile Professional Edition - Seafile Admin Manual

https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server/
generic

update sdoc editor version · haiwen/seahub@4c53017 · GitHub

https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987
generic

fix: merge 2.0 to fix link&whiteboard xss bug · haiwen/seadoc-editor@8fa988a · GitHub

https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2
generic

seafile_xss.md · GitHub

https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@seafile/sdoc-editor—2.0.209—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 116 total refreshes for this CVE.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-25 14:18 UTCEPSS rescore
  4. 2026-07-25 14:17 UTCEPSS rescore
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  6. 2026-07-23 14:18 UTCEPSS rescore
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  8. 2026-07-23 03:08 UTCEG score recompute
  9. 2026-07-22 14:08 UTCEPSS rescore
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  11. 2026-07-21 15:24 UTCEPSS rescore
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  18. 2026-07-18 10:04 UTCEPSS rescore
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  20. 2026-07-17 05:54 UTCOSV refresh
  21. 2026-07-16 17:03 UTCEPSS rescore
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  23. 2026-07-15 16:57 UTCEPSS rescore
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  25. 2026-07-15 02:00 UTCEPSS rescore
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  1. 2026-07-15 02:00 UTCEPSS rescore
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  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-07 13:46 UTCEPSS rescore
  9. 2026-07-06 16:27 UTCEPSS rescore
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  16. 2026-06-30 23:22 UTCEPSS rescore
  17. 2026-06-29 14:06 UTCEPSS rescore
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  19. 2026-06-28 14:07 UTCEPSS rescore
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  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-25 13:49 UTCEPSS rescore
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  26. 2026-06-24 14:05 UTCEPSS rescore
  27. 2026-06-23 21:33 UTCEPSS rescore
  28. 2026-06-23 21:33 UTCEPSS rescore
  29. 2026-06-22 14:25 UTCEPSS rescore
  30. 2026-06-22 14:25 UTCEPSS rescore
  31. 2026-06-21 14:56 UTCEPSS rescore
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  36. 2026-06-18 17:52 UTCEPSS rescore
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  38. 2026-06-17 17:53 UTCEPSS rescore
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  40. 2026-06-15 17:49 UTCEPSS rescore
  41. 2026-06-14 23:18 UTCEPSS rescore
  42. 2026-06-13 23:00 UTCEPSS rescore
  43. 2026-06-12 23:12 UTCEPSS rescore
  44. 2026-06-12 23:12 UTCEPSS rescore
  45. 2026-06-11 14:00 UTCEPSS rescore
  46. 2026-06-10 22:18 UTCEPSS rescore
  47. 2026-06-10 22:18 UTCEPSS rescore
  48. 2026-06-10 13:22 UTCEPSS rescore
  49. 2026-06-08 14:17 UTCEPSS rescore
  50. 2026-06-08 14:17 UTCEPSS rescore
  51. 2026-06-07 15:25 UTCEPSS rescore
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  54. 2026-06-06 13:47 UTCEPSS rescore
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  56. 2026-06-05 22:47 UTCEPSS rescore
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  58. 2026-06-05 06:10 UTCEPSS rescore
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  60. 2026-06-04 13:12 UTCEPSS rescore
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  62. 2026-06-01 13:51 UTCEPSS rescore
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  64. 2026-05-31 22:30 UTCEPSS rescore
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  66. 2026-05-31 00:16 UTCEPSS rescore
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  68. 2026-05-29 13:44 UTCEPSS rescore
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  70. 2026-05-28 13:44 UTCEPSS rescore
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  73. 2026-05-27 13:40 UTCEPSS rescore
  74. 2026-05-27 13:40 UTCEPSS rescore
  75. 2026-05-27 13:40 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-30587?
CVE-2026-30587 is a high vulnerability published on March 25, 2026. 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…
When was CVE-2026-30587 disclosed?
CVE-2026-30587 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-30587 actively exploited?
CVE-2026-30587 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.1% of all scored CVEs.
What is the CVSS score of CVE-2026-30587?
CVE-2026-30587 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-30587?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-30587, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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