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TI-2025-40091 Aliases CVE-2025-64753

grist-core has insufficient access control in endpoints for comparisons between documents and versions

Priority LOW 28CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-863.

Summary

grist-core is a spreadsheet hosting server. Prior to version 1.7.7, a user with only partial read access to a document could still access endpoints listing hashes for versions of that document and receive a full list of changes between versions, even if those changes contained cells, columns, or tables to which the user was not supposed to have read access. This was fixed in version 1.7.7 by restricting the `/compare` endpoint to users with full read access. As a workaround, remove sensitive document history using the `/states/remove` endpoint. Another possibility is to block the `/compare` endpoint.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00241 15th percentileScored 2026-11-07
Fix Fixed grist-core (gristlabs): 1.7.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gristlabsgrist-corebefore 1.7.71.7.7Patch availableCNA
  • grist-core Vendorgristlabs Affected before 1.7.7 Fixed in 1.7.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:getgrist:grist-core:*:*:*:*:*:*:*:*before 1.7.7Vulnerablegristlabs
  • cpe:2.3:a:getgrist:grist-core:*:*:*:*:*:*:*:* Versions before 1.7.7 Vulnerable ·gristlabs

Remediation

  • Fix · CNA grist-core (gristlabs) Fixed in 1.7.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-64753

References

Advisory 1

Other 1

  • TI-2026-19341 pyodide sandbox option is insecure CVSS 3.1CRITICAL 9.6
  • TI-2024-37319 Cross-site Scripting vulnerability through HyperLink cells in grist-core CVSS 3.1HIGH 8.1
  • TI-2024-37318 Cross-site Scripting vulnerability through svg attachment previews in grist-core CVSS 3.1HIGH 8.1
  • TI-2024-37317 Cross-site Scripting vulnerability through custom widget URLs and form redirect URLs in grist-core CVSS 3.1HIGH 8.1
  • TI-2025-40090 grist-core has path to server-side requests via websocket CVSS 3.1MEDIUM 6.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences