Vulnerability Details : CVE-2021-31403

Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:vaadin-server versions 7.0.0 through 7.7.23 (Vaadin 7.0.0 through 7.7.23), and 8.0.0 through 8.12.2 (Vaadin 8.0.0 through 8.12.2) allows attacker to guess a security token via timing attack
Published 2021-04-23 16:15:09
Updated 2021-04-30 19:00:07
Source Vaadin Ltd.
View at NVD,   CVE.org
Vulnerability category: Cross-site request forgery (CSRF)

Exploit prediction scoring system (EPSS) score for CVE-2021-31403

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 14 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-31403

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
1.9
 LOW AV:L/AC:M/Au:N/C:P/I:N/A:N
3.4
2.9
 NIST
2.5
 LOW CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
1.0
1.4
 NIST
4.0
 MEDIUM CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
1.4
2.5
 Vaadin Ltd.

CWE ids for CVE-2021-31403

  • 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.
    Assigned by: nvd@nist.gov (Primary)
  • Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
    Assigned by: security@vaadin.com (Secondary)

References for CVE-2021-31403

Products affected by CVE-2021-31403

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