CVE-2021-44878
7.5 · HIGHOverview
CVE-2021-44878 is a high-severity vulnerability affecting pac4j pac4j. It was published on January 6, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from pac4j. Update pac4j to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| pac4j | pac4j | >= 0, < 4.5.5 | Affected |
References
Frequently Asked Questions
What is CVE-2021-44878?
CVE-2021-44878 is a high-severity vulnerability affecting pac4j pac4j. It was published on January 6, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-44878?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-44878?
Check the references section for vendor advisories and patches from pac4j. Update pac4j to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-44878?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-44878 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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