| Package | Affected versions | Patched versions |
|---|---|---|
| io.vertx:vertx-web | ≥ 4.0.0-milestone1, < 4.0.0-milestone5≥ 4.0.0-milestone2, < 4.0.0-milestone5≥ 4.0.0-milestone3, < 4.0.0-milestone5≥ 4.0.0-milestone4, < 4.0.0-milestone5 | 4.0.0-milestone5 |
| vert.x-web | = 4.0.0 |
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.
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