What is CVE-2021-32697?

CVE-2021-32697 is a medium-severity improper input validation vulnerability in neos/form (composer), affecting versions >= 1.2.0, < 4.3.3. It is fixed in 4.3.3, 5.0.9, 5.1.3. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.

How severe is CVE-2021-32697?

CVE-2021-32697 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of neos/form are affected by CVE-2021-32697?

neos/form (composer) versions >= 1.2.0, < 4.3.3 is affected.

Is there a fix for CVE-2021-32697?

Yes. CVE-2021-32697 is fixed in 4.3.3, 5.0.9, 5.1.3. Upgrade to this version or later.

Is CVE-2021-32697 exploitable, and should I be worried?

Whether CVE-2021-32697 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2021-32697 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

How do I fix CVE-2021-32697?

Upgrade: neos/form to 4.3.3 or later, neos/form to 5.0.9 or later, neos/form to 5.1.3 or later.

CVE-2021-32697 in neos/form

Q: How severe is CVE-2021-32697?

CVE-2021-32697 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of neos/form are affected by CVE-2021-32697?

neos/form (composer) versions >= 1.2.0, < 4.3.3 is affected.

Q: Is there a fix for CVE-2021-32697?

Yes. CVE-2021-32697 is fixed in 4.3.3, 5.0.9, 5.1.3. Upgrade to this version or later.

Q: Is CVE-2021-32697 exploitable, and should I be worried?

Whether CVE-2021-32697 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2021-32697 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2021-32697?

Upgrade: neos/form to 4.3.3 or later, neos/form to 5.0.9 or later, neos/form to 5.1.3 or later.

Summary

Form validation can be skipped

Workarounds

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.

References

This regression was introduced with https://github.com/neos/form/commit/049d415295be8d4a0478ccba97dba1bb81649567
Original report: https://tickets.neos.io/#ticket/zoom/411 (internal)

Impact

By crafting a special GET request containing a valid form state, a form can be submitted without invoking any validators.
We consider the severity low because it is not possible to change any form values since the 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.

The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths. Typical impact: varies by context: data corruption, logic bypass, or denial of service.

CVE-2021-32697 has a CVSS score of 6.5 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (4.3.3, 5.0.9, 5.1.3); upgrading removes the vulnerable code path.

Affected versions

neos/form (>= 1.2.0, < 4.3.3) neos/form (>= 5.0.0, < 5.0.9) neos/form (>= 5.1.0, < 5.1.3)

Security releases

neos/form → 4.3.3 (composer) neos/form → 5.0.9 (composer) neos/form → 5.1.3 (composer)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

https://github.com/neos/form/commit/69de4219b1f58157e2be6b05811463875d75c246

Frequently Asked Questions

What is CVE-2021-32697? CVE-2021-32697 is a medium-severity improper input validation vulnerability in neos/form (composer), affecting versions >= 1.2.0, < 4.3.3. It is fixed in 4.3.3, 5.0.9, 5.1.3. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.
How severe is CVE-2021-32697? CVE-2021-32697 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of neos/form are affected by CVE-2021-32697? neos/form (composer) versions >= 1.2.0, < 4.3.3 is affected.
Is there a fix for CVE-2021-32697? Yes. CVE-2021-32697 is fixed in 4.3.3, 5.0.9, 5.1.3. Upgrade to this version or later.
Is CVE-2021-32697 exploitable, and should I be worried? Whether CVE-2021-32697 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2021-32697 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2021-32697?
- Upgrade neos/form to 4.3.3 or later
- Upgrade neos/form to 5.0.9 or later
- Upgrade neos/form to 5.1.3 or later