How severe is CVE-2025-63388?

CVE-2025-63388 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-63388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63388?

CVE-2025-63388 affects Langgenius Dify. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63388?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-63388 have an EU (EUVD) identifier?

Yes. CVE-2025-63388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204306.

When was CVE-2025-63388 published?

CVE-2025-63388 was published on 2025-12-18 and last updated on 2026-06-17.

CVE-2025-63388

CVE-2025-63388 is a critical-severity vulnerability in Langgenius Dify with a CVSS 3.x base score of 9.1. 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-346.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204306
Weakness: CWE-346
Affected product: Langgenius Dify
Published: 2025-12-18
Last modified: 2026-06-17

Description

A Cross-Origin Resource Sharing (CORS) misconfiguration vulnerability exists in Dify v1.9.1 in the /console/api/system-features endpoint. The endpoint implements an overly permissive CORS policy that reflects arbitrary Origin headers and sets Access-Control-Allow-Credentials: true, allowing any external domain to make authenticated cross-origin requests. NOTE: the Supplier disputes this, providing the rationale of "sending requests with credentials does not provide any additional access compared to unauthenticated requests."

Frequently asked questions

What is CVE-2025-63388?: A Cross-Origin Resource Sharing (CORS) misconfiguration vulnerability exists in Dify v1.9.1 in the /console/api/system-features endpoint. The endpoint implements an overly permissive CORS policy that reflects arbitrary Origin headers and sets Access-Control-Allow-Credentials: true, allowing any external domain to make authenticated cross-origin requests. NOTE: the Supplier disputes this, providing the rationale of "sending requests with credentials does not provide any additional access compared to unauthenticated requests."
How severe is CVE-2025-63388?: CVE-2025-63388 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-63388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63388?: CVE-2025-63388 affects Langgenius Dify. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-63388 have an EU (EUVD) identifier?: Yes. CVE-2025-63388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204306.
When was CVE-2025-63388 published?: CVE-2025-63388 was published on 2025-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:langgenius:dify:1.9.1:*:*:*:*:node.js:*:*

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