CVE-2025-57755
CVE-2025-57755 is a high-severity vulnerability with a CVSS 4.0 base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.
Key facts
- Severity: High (CVSS 4.0 base score 8.1)
- EPSS exploit prediction: 0% (20th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-25479
- Weakness: CWE-200
- Published:
- Last modified:
Description
claude-code-router is a powerful tool to route Claude Code requests to different models and customize any request. Due to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data. The issue has been patched in v1.0.34.
Frequently asked questions
- What is CVE-2025-57755?
- claude-code-router is a powerful tool to route Claude Code requests to different models and customize any request. Due to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data. The issue has been patched in v1.0.34.
- How severe is CVE-2025-57755?
- CVE-2025-57755 has a CVSS 4.0 base score of 8.1, rated high severity.
- Is CVE-2025-57755 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-57755?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-57755 have an EU (EUVD) identifier?
- Yes. CVE-2025-57755 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25479.
- When was CVE-2025-57755 published?
- CVE-2025-57755 was published on 2025-08-21 and last updated on 2026-06-17.
References
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