What is CVE-2024-2435?

CVE-2024-2435 is a medium-severity cross-site scripting (XSS) vulnerability in github.com/temporalio/ui-server/v2 (go), affecting versions < 2.25.0. It is fixed in 2.25.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.

How severe is CVE-2024-2435?

CVE-2024-2435 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of github.com/temporalio/ui-server/v2 are affected by CVE-2024-2435?

github.com/temporalio/ui-server/v2 (go) versions < 2.25.0 is affected.

Is there a fix for CVE-2024-2435?

Yes. CVE-2024-2435 is fixed in 2.25.0. Upgrade to this version or later.

Is CVE-2024-2435 exploitable, and should I be worried?

Whether CVE-2024-2435 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2024-2435 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2024-2435 in github.com/temporalio/ui-server/v2

Q: How severe is CVE-2024-2435?

CVE-2024-2435 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of github.com/temporalio/ui-server/v2 are affected by CVE-2024-2435?

github.com/temporalio/ui-server/v2 (go) versions < 2.25.0 is affected.

Q: Is there a fix for CVE-2024-2435?

Yes. CVE-2024-2435 is fixed in 2.25.0. Upgrade to this version or later.

Q: Is CVE-2024-2435 exploitable, and should I be worried?

Whether CVE-2024-2435 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2024-2435 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2024-2435?

Upgrade github.com/temporalio/ui-server/v2 to 2.25.0 or later.

Summary

Temporal UI Server cross-site scripting vulnerability

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).

Impact

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

CVE-2024-2435 has a CVSS score of 4.3 (Medium). The vector is network-reachable, high privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.25.0); upgrading removes the vulnerable code path.

Affected versions

github.com/temporalio/ui-server/v2 (< 2.25.0)

Security releases

github.com/temporalio/ui-server/v2 → 2.25.0 (go)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade github.com/temporalio/ui-server/v2 to 2.25.0 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2024-2435? CVE-2024-2435 is a medium-severity cross-site scripting (XSS) vulnerability in github.com/temporalio/ui-server/v2 (go), affecting versions < 2.25.0. It is fixed in 2.25.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
How severe is CVE-2024-2435? CVE-2024-2435 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of github.com/temporalio/ui-server/v2 are affected by CVE-2024-2435? github.com/temporalio/ui-server/v2 (go) versions < 2.25.0 is affected.
Is there a fix for CVE-2024-2435? Yes. CVE-2024-2435 is fixed in 2.25.0. Upgrade to this version or later.
Is CVE-2024-2435 exploitable, and should I be worried? Whether CVE-2024-2435 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2024-2435 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2024-2435? Upgrade github.com/temporalio/ui-server/v2 to 2.25.0 or later.