CVE-2021-32697

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

• CWE-20

• https://github.com/neos/form-ghsa-m5vx-8chx-qvmm/pull/1Broken Link
• https://github.com/neos/form/commit/049d415295be8d4a0478ccba97dba1bb81649567Patch, Third Party Advisory
• https://github.com/neos/form/commit/69de4219b1f58157e2be6b05811463875d75c246Patch, Third Party Advisory
• https://github.com/neos/form/releases/tag/5.1.3Release Notes, Third Party Advisory
• https://github.com/neos/form/security/advisories/GHSA-m5vx-8chx-qvmmThird Party Advisory
• https://github.com/neos/form-ghsa-m5vx-8chx-qvmm/pull/1Broken Link
• https://github.com/neos/form/commit/049d415295be8d4a0478ccba97dba1bb81649567Patch, Third Party Advisory
• https://github.com/neos/form/commit/69de4219b1f58157e2be6b05811463875d75c246Patch, Third Party Advisory
• https://github.com/neos/form/releases/tag/5.1.3Release Notes, Third Party Advisory
• https://github.com/neos/form/security/advisories/GHSA-m5vx-8chx-qvmmThird Party Advisory

Published

Jun 21, 2021

Last Modified

Jun 17, 2026

Status

Modified

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