{"id":"CVE-2025-53528","aliases":["GHSA-2gxp-6r36-m97r","PYSEC-2025-71"],"url":"https://o3.security/vulnerability/CVE-2025-53528","summary":"Cadwyn is vulnerable to an XSS attack through its docs page","details":"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.","published":"2025-07-21T20:15:17.464Z","modified":"2026-07-16T03:47:50.496108511Z","cvss":{"score":7.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"cadwyn","fixedVersion":"5.4.3"}],"fix":{"url":"https://github.com/zmievsa/cadwyn/commit/b424ecd57cd8dabbc8fe39b8f8ccafea629c7728","label":"zmievsa/cadwyn@b424ecd"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53528.json"},{"type":"ADVISORY","url":"https://github.com/zmievsa/cadwyn/security/advisories/GHSA-2gxp-6r36-m97r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53528"},{"type":"FIX","url":"https://github.com/zmievsa/cadwyn/commit/b424ecd57cd8dabbc8fe39b8f8ccafea629c7728"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-16T03:47:50.496108511Z"}}