CVE-2021-32697 Information

Description

neos/forms is an open source framework to build web forms. By crafting a special GET request containing a valid form state a form can be submitted without invoking any validators. Form state is secured with an HMAC that is still verified. That means that this issue can only be exploited if Form Finishers cause side effects even if no form values have been sent. Form Finishers can be adjusted in a way that they only execute an action if the submitted form contains some expected data. Alternatively a custom Finisher can be added as first finisher. This regression was introduced with https://github.com/neos/form/commit/049d415295be8d4a0478ccba97dba1bb81649567

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://github.com/neos/form/releases/tag/5.1.3 https://github.com/neos/form-ghsa-m5vx-8chx-qvmm/pull/1 https://github.com/neos/form/commit/69de4219b1f58157e2be6b05811463875d75c246 https://github.com/neos/form/security/advisories/GHSA-m5vx-8chx-qvmm https://github.com/neos/form/commit/049d415295be8d4a0478ccba97dba1bb81649567

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3