Vulnerability in Langgenius Dify
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."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (12.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Langgenius Dify — versions 1.9.1
Weakness classification (CWE)
References
- github.com/langgenius/dify/discussions (Issue Tracking)
- gist.github.com/Cristliu/5ded6d03e41d7d66ecb1b568bae3ff6c (Third Party Advisory)
- gist.github.com/Cristliu/c2bc7d05abd89db8eb542a453a528d77
Frequently asked questions
- What is CVE-2025-63388?
- CVE-2025-63388 is a critical-severity vulnerability in Langgenius Dify, classified under Origin Validation Error. CVSS score: 9.1/10. Published 2025-12-18.
- How severe is CVE-2025-63388?
- Critical severity. CVSS v3 base score is 9.1 out of 10.