Medium severity · published Apr 19, 2021
CVE-2021-29455
Grassroot Platform is an application to make it faster, cheaper and easier to persistently organize and mobilize people in low-income communities
5.3
CVSS
0.8%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GP
Grassroot Platform · Grassroot
before 1.3.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-29455
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-29455
Product
https://github.com/grassrootza/grassroot-platform/
Patch
https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f
Third Party Advisory
https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734
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