Critical
MFA bypass in Apereo CAS
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-4612
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 02:51 UTC · Revision 1
Source evidence
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.
osv:CVE-2023-4612
Complete source record
{
"id": "3bf789f74372c14e018898598aba1e5f7e6e6488254cfab53407974bee07d7d0",
"url": "https://osv.dev/vulnerability/CVE-2023-4612",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "MFA bypass in Apereo CAS",
"summary": "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.",
"evidence": "osv:CVE-2023-4612",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2023-4612",
"aliases": [
"CVE-2023-4612"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apereo/cas",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "b1e65f89a4854e3690b68a52b0589ecbbbb1eb3f"
},
{
"introduced": "3d85259c3615ba1e15ffab46757b8c3567821749"
},
{
"last_affected": "d2930a9ee92f9530438f1887b8711a6a2a609f0d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "7.0.0"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:7.0.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0-rc1"
},
{
"last_affected": "7.0.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:7.0.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0-rc2"
},
{
"last_affected": "7.0.0-rc2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:7.0.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0-rc3"
},
{
"last_affected": "7.0.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:7.0.0:rc4:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0-rc4"
},
{
"last_affected": "7.0.0-rc4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:7.0.0:rc5:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0-rc5"
},
{
"last_affected": "7.0.0-rc5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:7.0.0:rc6:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0-rc6"
},
{
"last_affected": "7.0.0-rc6"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apereo:central_authentication_service:7.0.0:rc7:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0-rc7"
},
{
"last_affected": "7.0.0-rc7"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"7.0.0-rc1",
"7.0.0-rc2",
"7.0.0-rc3",
"7.0.0-rc4",
"7.0.0-rc5",
"7.0.0-rc6",
"7.0.0-rc7",
"v7.0.0-RC9",
"v7.0.0-RC7",
"v6.6.0-RC2",
"v6.6.0-RC1",
"v6.5.0-RC4",
"v6.5.0-RC3",
"v6.5.0-RC2",
"v6.4.0-RC1",
"v6.3.0-RC5",
"v6.3.0-RC2",
"6.3.0-RC1",
"v6.2.0-RC5",
"v6.1.0-RC6",
"v6.1.0-RC5",
"v4.0.0-RC1",
"v3.5.1-RC1",
"v3.5.0",
"v3.5.0-RC2",
"v3.5.0-RC1",
"v3.4.11",
"3.4.11-RC1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-4612.json"
}
}
],
"modified": "2026-10-28T02:30:25.193335393Z",
"provider": "osv",
"references": [
"https://www.apereo.org/projects/cas",
"https://cert.pl/en/posts/2023/11/CVE-2023-4612/",
"https://cert.pl/posts/2023/11/CVE-2023-4612/",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4612.json",
"https://nvd.nist.gov/vuln/detail/CVE-2023-4612"
],
"provider_metadata": {
"cwe_ids": [
"CWE-302"
],
"cna_assigner": "CERT-PL",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"last_affected": "7.0.0-RC7"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4612.json"
}
},
"related_cves": [
{
"value": "CVE-2023-4612",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492048,
"published_at": "2023-11-09T13:41:38.189+00:00"
}