CVE-2021-29455

Missing validation of JWT signature in `grassrootza/grassroot-platform`

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).

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.20%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: grassrootza grassroot-platform
Published at:
Updated at:

References

Link Tags
https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734 third party advisory
https://github.com/grassrootza/grassroot-platform/ third party advisory product
https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-29455?
CVE-2021-29455 has been scored as a high severity vulnerability.
How to fix CVE-2021-29455?
To fix CVE-2021-29455, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-29455 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-29455 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-29455?
CVE-2021-29455 affects grassrootza grassroot-platform.
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