CVE-2021-29455CWE-347

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

High · published April 19, 2021

CVSS v3.1
7.5
EPSS
1%
Percentile
54.7
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00757 · 54.7th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2021-04-19T19:05Z
EPSS history
Timeline
  • 19 APR 19:05Z
    Missing validation of JWT signature in `grassrootza/grassroot-platform`
    cvelistv5