VULNERABILITY INTELLIGENCE

CVE-2025-53528

CVSS score7.6 HIGH
EPSS probability0.28%
CISA KEVNot currently listed
Published2025-07-21
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L

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.

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references