CVE-2025-53528

HIGH

Cadwyn < 5.4.3 - Reflected Cross-Site Scripting via Docs Endpoint Version Parameter

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 7.6
EPSS 0.0024
EPSS Percentile 46.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
pypi/cadwyn 0 - 5.4.3PyPI
zmievsa/cadwyn < 5.4.3
Published Jul 21, 2025
Tracked Since Feb 18, 2026