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    CVE-2023-4612

    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.

    Published:Nov 9, 2023
    Last Modified:Feb 26, 2025
    EPS:Nov 9, 2023
    EPSS Score:0.00044
    CVSS Score:9.8

    Affected Products

    Vendor
    Apereo
    Product
    Central Authentication Service

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-114 Authentication Abuse
    CAPEC-115 Authentication Bypass
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-151 Identity Spoofing
    CAPEC-194 Fake the Source of Data
    CAPEC-21 Exploitation of Trusted Identifiers
    CAPEC-22 Exploiting Trust in Client
    CAPEC-274 HTTP Verb Tampering
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-39 Manipulating Opaque Client-based Data Tokens
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
    CAPEC-593 Session Hijacking
    CAPEC-633 Token Impersonation
    CAPEC-650 Upload a Web Shell to a Web Server
    CAPEC-77 Manipulating User-Controlled Variables
    CAPEC-94 Adversary in the Middle (AiTM)

    Related CVEs

    CVE-2026-59099 (CVSS 9.3) — Apereo CAS 7.3.0 before 8.0.0-RC6 contains a cryptographic vulnerability that allows remote unauthenticated at…
    CVE-2025-3986 (CVSS 5.3) — A vulnerability was found in Apereo CAS 5.2.6. It has been declared as problematic. This vulnerability affects…
    CVE-2025-3985 (CVSS 5.1) — A vulnerability was found in Apereo CAS 5.2.6. It has been classified as problematic. This affects the functio…
    CVE-2025-3984 (CVSS 2.3) — A vulnerability was found in Apereo CAS 5.2.6 and classified as critical. Affected by this issue is the functi…
    CVE-2024-11207 (CVSS 5.3) — A vulnerability has been found in Apereo CAS 6.6 and classified as problematic. Affected by this vulnerability…
    CVE-2024-11209 (CVSS 5.3) — A vulnerability was found in Apereo CAS 6.6. It has been classified as critical. This affects an unknown part …
    CVE-2024-11208 (CVSS 6.3) — A vulnerability was found in Apereo CAS 6.6 and classified as problematic. Affected by this issue is some unkn…
    CVE-2024-4399 (CVSS 9.1) — The does not validate a parameter before making a request to it, which could allow unauthenticated users to p…
    CVE-2023-28857 (CVSS 4) — Apereo CAS is an open source multilingual single sign-on solution for the web. Apereo CAS can be configured to…
    CVE-2021-42567 (CVSS 6.1) — Apereo CAS through 6.4.1 allows XSS via POST requests sent to the REST API endpoints.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High