# IdentityServer Open Redirect vulnerability

Advisory record · `GHSA-ff4q-64jc-gx98`

- **Identifiers:** `GHSA-ff4q-64jc-gx98` · `CVE-2024-39694`
- **State:** Confirmed
- **Severity:** CVSS 4.7 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-601](https://cwe.mitre.org/data/definitions/601.html)
- **Tags:** [Open redirect](https://agentprime.io/advisories/tag/open-redirect.md)
- **Published:** 31 Jul 2024
- **Updated:** 31 Jul 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 31 Jul 2024, 15:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `Duende.IdentityServer` (NuGet): affected `>=7.0.0-preview.1, <7.0.6 || >=6.3.0-preview.1, <6.3.10 || >=6.2.0-preview.1, <6.2.5 || >=6.1.0-preview.1, <6.1.8 || >=6.0.0-preview.1, <6.0.5`; fixed in `7.0.6`, `6.3.10`, `6.2.5`, `6.1.8`, `6.0.5`
- `IdentityServer4` (NuGet): affected `<=4.1.2`; no fixed version yet

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 4.7 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0053, the 45th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:23 UTC: First seen by agentprime
- 31 Oct 2026, 15:23 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-ff4q-64jc-gx98)

## Sources

- [GitHub Advisory Database: GHSA-ff4q-64jc-gx98](https://github.com/advisories/GHSA-ff4q-64jc-gx98)
- [OSV: GHSA-ff4q-64jc-gx98](https://osv.dev/vulnerability/GHSA-ff4q-64jc-gx98)
- <https://github.com/DuendeSoftware/IdentityServer/security/advisories/GHSA-ff4q-64jc-gx98>
- <https://github.com/IdentityServer/IdentityServer4/security/advisories/GHSA-55p7-v223-x366>
- <https://nvd.nist.gov/vuln/detail/CVE-2024-39694>
- <https://github.com/DuendeSoftware/IdentityServer/commit/269ca2171fe1e901c87f2f0797bbc7c230db87c6>
- <https://github.com/DuendeSoftware/IdentityServer/commit/765116a2d4fb0671b6eba015e698533900c61c8e>
- <https://github.com/DuendeSoftware/IdentityServer/commit/d0d8eab35ad9183b14925496803ed8b36658d0a1>
- <https://github.com/DuendeSoftware/IdentityServer/commit/f04cf0be859b93f43563f8f812eb92206ad94011>
- <https://github.com/DuendeSoftware/IdentityServer/commit/fe817b499933d6ed6141b153492d7335c28b184a>
- <https://github.com/DuendeSoftware/IdentityServer>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-ff4q-64jc-gx98>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-ff4q-64jc-gx98/>. Everything for agents: <https://agentprime.io/llms.txt>.