CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVE-2020-35217
High (8.8) in eclipse vert.x-web. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in io.vertx:vertx-web 4.0.0-milestone5.
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.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-31)
- CWE
- CWE-352
- Published
- Modified
- Record from
- the NVD, synced
Affected
- eclipse:vert.x-web
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9q69-g5gc-9fgf | Maven | io.vertx:vertx-web | >=4.0.0-milestone1 <4.0.0-milestone5 | 4.0.0-milestone5 |
| GHSA-9q69-g5gc-9fgf | Maven | io.vertx:vertx-web | >=4.0.0-milestone2 <4.0.0-milestone5 | 4.0.0-milestone5 |
| GHSA-9q69-g5gc-9fgf | Maven | io.vertx:vertx-web | >=4.0.0-milestone3 <4.0.0-milestone5 | 4.0.0-milestone5 |
| GHSA-9q69-g5gc-9fgf | Maven | io.vertx:vertx-web | >=4.0.0-milestone4 <4.0.0-milestone5 | 4.0.0-milestone5 |