Vulnerabilities (CVE)

Filtered by vendor Pac4j Subscribe
Filtered by product Pac4j
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-44878 1 Pac4j 1 Pac4j 2022-05-13 5.0 MEDIUM 7.5 HIGH
If an OpenID Connect provider supports the "none" algorithm (i.e., tokens with no signature), pac4j v5.3.0 (and prior) does not refuse it without an explicit configuration on its side or for the "idtoken" response type which is not secure and violates the OpenID Core Specification. The "none" algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using "none" as the value of "alg" key in the header with an empty signature value.