Open Redirect Affecting @cloudflare/workers-oauth-provider package, versions <0.0.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-CLOUDFLAREWORKERSOAUTHPROVIDER-10118138
- published14 May 2025
- disclosed1 May 2025
- creditUnknown
Introduced: 1 May 2025
NewCVE-2025-4143 (opens in a new tab)How to fix?
Upgrade @cloudflare/workers-oauth-provider to version 0.0.5 or higher.
Overview
@cloudflare/workers-oauth-provider is an OAuth provider for Cloudflare Workers
Affected versions of this package are vulnerable to Open Redirect due to the missing validation of the redirect URI on the authorize endpoint. An attacker can impersonate a user and potentially steal credentials by tricking a victim into visiting a malicious website. This is only exploitable if the OAuth server's authorized callback is designed to auto-approve authorizations that appear to come from an OAuth client that the victim has previously authorized.