What’s Vulnerable › Vulnerabilities

CVE-2024-56357: Cross-site Scripting vulnerability through custom widget URLs and form redirect URLs in grist-core

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-20 · updated 2026-06-17
• Weakness: CWE-79

Description

grist-core is a spreadsheet hosting server. A user visiting a malicious document or submitting a malicious form could have their account compromised, because it was possible to use the `javascript:` scheme with custom widget URLs and form redirect URLs. This issue has been patched in version 1.3.1. Users are advised to upgrade. Users unable to upgrade should avoid visiting documents or forms prepared by people they do not trust.

Affected products

• gristlabs grist-core: before 1.3.1 — fixed in 1.3.1

How to fix

Upgrade to a fixed version: gristlabs grist-core 1.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/gristlabs/grist-core/commit/10b069005ec8d5f511e6554a56111d8f257f029e
• https://github.com/gristlabs/grist-core/security/advisories/GHSA-cq5q-cqr7-vmf6

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