CVE-2023-4612

Name: CVE-2023-4612
Creator: NVD / NIST
Published: 2023-11-09T14:15:08.183+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.94%

Last modified Jun 17, 2026

CVE-2023-4612 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Improper Authentication vulnerability in Apereo CAS in jakarta.servlet.http.HttpServletRequest.getRemoteAddr method allows Multi-Factor Authentication bypass.This issue affects CAS: through 7.0.0-RC7. It is unknown whether in new versions the issue will be fixed. EPSS estimates a 0.94% chance of exploitation in the next 30 days.

Description

Improper Authentication vulnerability in Apereo CAS in jakarta.servlet.http.HttpServletRequest.getRemoteAddr method allows Multi-Factor Authentication bypass.This issue affects CAS: through 7.0.0-RC7. It is unknown whether in new versions the issue will be fixed. For the date of publication there is no patch, and the vendor does not treat it as a vulnerability.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.94%

56.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Apereo	Central Authentication Service	< 7.0.0	—
Apereo	Central Authentication Service	7.0.0	Rc1

References

https://cert.pl/en/posts/2023/11/CVE-2023-4612/Third Party Advisory
https://cert.pl/posts/2023/11/CVE-2023-4612/Third Party Advisory
https://cert.pl/en/posts/2023/11/CVE-2023-4612/Third Party Advisory
https://cert.pl/posts/2023/11/CVE-2023-4612/Third Party Advisory

Timeline

Published: Nov 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4612?

How severe is CVE-2023-4612?

CVE-2023-4612 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4612?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4612?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST