CVE-2020-35217
Cross-Site Request Forgery in Vert.x-Web framework
8.8
HIGH
CVSS 3.1
EPSS 0.15%
Description
Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.
How to fix CVE-2020-35217
To remediate CVE-2020-35217, upgrade the affected package to a fixed version below.
- —upgrade to 4.0.0-milestone5 or later
Is CVE-2020-35217 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 4.0.0-milestone1, < 4.0.0-milestone5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |