CVE-2025-53528
Cadwyn vulnerable to XSS on the docs page
7.6
HIGH
CVSS 3.1
EPSS 0.24%
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.
How to fix CVE-2025-53528
To remediate CVE-2025-53528, upgrade the affected package to a fixed version below.
- —upgrade to 5.4.3 or later
- —upgrade to b424ecd57cd8dabbc8fe39b8f8ccafea629c7728 or later
Is CVE-2025-53528 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 5.4.3
- from 0, < b424ecd57cd8dabbc8fe39b8f8ccafea629c7728 | from 0, < 5.4.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L |