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Observable Discrepancy


Severity Low
Score 2.5/10


Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server version 5.0.3, and com.vaadin:fusion-endpoint version 6.0.0 allows attacker to guess a security token for Fusion endpoints via timing attack. (This vulnerability is caused due to an incomplete fix of CVE-2021-31404)

  • HIGH
  • NONE
  • NONE
  • LOW
  • LOW
  • NONE

CWE-203 - Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Advisory Timeline

  • Published