{"cve":"CVE-2025-53528","nvd":{"published":"2025-07-21T21:15:25.883","modified":"2026-06-17T09:38:23.330","status":"Deferred","description":"Cadwyn creates production-ready community-driven modern Stripe-like API versioning in FastAPI. In versions before 5.4.3, the version parameter of the \"/docs\" endpoint is vulnerable to a Reflected XSS (Cross-Site Scripting) attack. This XSS would notably allow an attacker to execute JavaScript code on a user's session for any application based on Cadwyn via a one-click attack. The vulnerability has been fixed in version 5.4.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L","score":7.6},"cwes":["CWE-79"],"references":["https://github.com/zmievsa/cadwyn/commit/b424ecd57cd8dabbc8fe39b8f8ccafea629c7728","https://github.com/zmievsa/cadwyn/security/advisories/GHSA-2gxp-6r36-m97r"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:05:46.678065081+00:00"},"epss":{"cve":"CVE-2025-53528","score":0.00278,"percentile":0.20282,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-2gxp-6r36-m97r","url":"https://osv.dev/vulnerability/GHSA-2gxp-6r36-m97r","summary":"Cadwyn vulnerable to XSS on the docs page","modified":"2025-07-23T18:50:09.083672Z","packages":[{"ecosystem":"PyPI","name":"cadwyn","purl":"pkg:pypi/cadwyn","ranges":["<5.4.3"],"fixed":["5.4.3"]}]},{"id":"PYSEC-2025-71","url":"https://osv.dev/vulnerability/PYSEC-2025-71","summary":"","modified":"2025-07-23T16:12:16.996891Z","packages":[{"ecosystem":"PyPI","name":"cadwyn","purl":"pkg:pypi/cadwyn","ranges":["<5.4.3"],"fixed":["5.4.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}