4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
0.001 Low
EPSS
Percentile
42.2%
Affected versions of the jwt-simple
package allow users to select what algorithm the server will use to verify a provided JWT. A malicious actor can use this behaviour to arbitrarily modify the contents of a JWT while still passing verification. For the common use case of the JWT, the end result is a complete authentication bypass with minimal effort.
Update to version 0.3.1 or later.
Additionally, be sure to always specify an algorithm in calls to .decode()
.
CPE | Name | Operator | Version |
---|---|---|---|
jwt-simple | lt | 0.3.1 |
auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/
github.com/advisories/GHSA-vgrx-w6rg-8fqf
github.com/hokaccha/node-jwt-simple/commit/957957cfa44474049b4603b293569588ee9ffd97
github.com/hokaccha/node-jwt-simple/pull/14
github.com/hokaccha/node-jwt-simple/pull/16
nvd.nist.gov/vuln/detail/CVE-2016-10555
www.npmjs.com/advisories/87
4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
0.001 Low
EPSS
Percentile
42.2%