CVE-2021-32697 : neos/forms is an open source framework to build web forms. By crafting a special

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

Published 2021-06-21 19:15:08

Updated 2021-06-29 14:53:56

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2021-32697

Neos » Form
Versions from including (>=) 5.0.0 and before (<) 5.0.9
cpe:2.3:a:neos:form:*:*:*:*:*:*:*:*
Matching versions
Neos » Form
Versions from including (>=) 5.1.0 and before (<) 5.1.3
cpe:2.3:a:neos:form:*:*:*:*:*:*:*:*
Matching versions
Neos » Form
Versions from including (>=) 1.2.0 and before (<) 4.3.3
cpe:2.3:a:neos:form:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-32697

EPSS FAQ

0.08%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 35 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-32697

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: None
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	3.9	2.5	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2021-32697

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: security-advisories@github.com (Primary)

References for CVE-2021-32697

https://github.com/neos/form/commit/049d415295be8d4a0478ccba97dba1bb81649567

[BUGFIX] fix reconstituting a form from its internal state · neos/form@049d415 · GitHub
Patch;Third Party Advisory
https://github.com/neos/form-ghsa-m5vx-8chx-qvmm/pull/1

Page not found · GitHub · GitHub
Broken Link
https://github.com/neos/form/security/advisories/GHSA-m5vx-8chx-qvmm

Form validation can be skipped · Advisory · neos/form · GitHub
Third Party Advisory
https://github.com/neos/form/commit/69de4219b1f58157e2be6b05811463875d75c246

Merge pull request from GHSA-m5vx-8chx-qvmm · neos/form@69de421 · GitHub
Patch;Third Party Advisory
https://github.com/neos/form/releases/tag/5.1.3

Release 5.1.3 - Security bugfix · neos/form · GitHub
Release Notes;Third Party Advisory

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Vulnerability Details : CVE-2021-32697

Products affected by CVE-2021-32697

Exploit prediction scoring system (EPSS) score for CVE-2021-32697

CVSS scores for CVE-2021-32697

CWE ids for CVE-2021-32697

References for CVE-2021-32697