CVE-2021-29455
7.5 · HIGHOverview
CVE-2021-29455 is a high-severity vulnerability affecting grassroot grassroot_platform. It was published on April 19, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Grassroot Platform is an application to make it faster, cheaper and easier to persistently organize and mobilize people in low-income communities. Grassroot Platform before master deployment as of 2021-04-16 did not properly verify the signature of JSON Web Tokens when refreshing an existing JWT. This allows to forge a valid JWT. The problem has been patched in version 1.3.1 by deprecating the JWT refresh function, which was an overdue deprecation regardless (the "refresh" flow is no longer used).
Remediation
Check the references section for vendor advisories and patches from grassroot. Update grassroot_platform to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| grassroot | grassroot_platform | >= 0, < 1.3.1 | Affected |
References
Frequently Asked Questions
What is CVE-2021-29455?
CVE-2021-29455 is a high-severity vulnerability affecting grassroot grassroot_platform. It was published on April 19, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-29455?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-29455?
Check the references section for vendor advisories and patches from grassroot. Update grassroot_platform to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-29455?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-29455 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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