CVE-2025-64753: grist-core Auth Bypass — Fix

Description

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
getgrist	grist-core	< 1.7.7

References

Advisories & Patches

https://github.com/gristlabs/grist-core/security/advisories/GHSA-3v78-cw58-v685

Other References

https://github.com/gristlabs/grist-core/releases/tag/v1.7.7

Frequently Asked Questions

What is CVE-2025-64753? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-64753? +

CVE-2025-64753 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-64753? +

CVE-2025-64753 affects products from getgrist, specifically: grist-core. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64753? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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