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Vulnerability · Published Jan 20, 2021 · Assigned by mitre

CVE-2020-35217

High 8.8

In plain English

A high-severity security flaw in the io.vertx:vertx-web package (Maven). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High
Exploit odds (30 days)0.6%top 51.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenio.vertx:vertx-web4.0.0-milestone5GHSA-9q69-g5gc-9fgf
Mavenio.vertx:vertx-web4.0.0-milestone5GHSA-9q69-g5gc-9fgf
Mavenio.vertx:vertx-web4.0.0-milestone5GHSA-9q69-g5gc-9fgf
Mavenio.vertx:vertx-web4.0.0-milestone5GHSA-9q69-g5gc-9fgf

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References