CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
54.9%
Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses. See CWE-400: Uncontrolled Resource Consumption Description Regular expression used on server side to validate input of email fields (com.vaadin.v7.data.validator.EmailValidator) is subjected to exponential backtracking, which may result in unbound resource consumption and Denial of Service. To perform such an attack it is enough to enter a malicious email address into any email field and submit a value to the server for validation. UI thread of the server can spend an indefinite amount of time (depending on the input) matching this email address to a validation pattern. By repeating this action the attacker may cause thread pool or resource exhaustion, thus making the application unresponsive for normal users. Affected products and mitigation Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include: Product version Mitigation Vaadin 8.0.0 - 8.12.4 Upgrade to 8.13.0 or newer 8 version Artifacts Maven coordinates Vulnerable version Fixed version com.vaadin:vaadin-compatibility-server 8.0.0 - 8.12.4 ≥ 8.13.0 Credit This issue was discovered and responsibly reported by Stefan Penndorf. References Issue: https://github.com/vaadin/framework/issues/12240 PR: https://github.com/vaadin/framework/pull/12241
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
54.9%