CVE-2025-27773

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Source
https://cve.org/CVERecord?id=CVE-2025-27773
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-27773.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-27773
Aliases
Downstream
Published
2025-03-11T19:04:52.135Z
Modified
2026-04-21T04:10:42.637917Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
Summary
SimpleSAMLphp SAML2 library has incorrect signature verification for HTTP-Redirect binding
Details

The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20, there is a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can cause the application to accept an unsigned message. Versions 4.17.0 and 5.0.0-alpha.20 contain a fix for the issue.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27773.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "4.17.0"
                },
                {
                    "introduced": "5.0.0-alpha.1"
                },
                {
                    "fixed": "5.0.0-alpha.20"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-347"
    ]
}
References

Affected packages

Git / github.com/simplesamlphp/saml2

Affected ranges

Type
GIT
Repo
https://github.com/simplesamlphp/saml2
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7867d6099dc7f31bed1ea10e5bea159c5623d2a0

Affected versions

1.*
1.5.3
v0.*
v0.1.0
v0.1.0-alpha
v0.3.0
v0.4.0
v0.4.1
v0.4.2
v0.5.0
v0.6.0
v0.6.1
v0.6.2
v0.6.3
v0.6.4
v0.7.0
v0.7.1
v0.8.0
v0.8.1
v1.*
v1.0.0
v1.1.0
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.6.0
v1.6.1
v1.7.0
v1.7.1
v2.*
v2.0.0
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.2
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5
v3.2.6
v3.3.0
v3.3.2
v3.3.3
v3.3.4
v3.3.5
v3.3.6
v3.4.0
v5.*
v5.0.0-alpha.16
v5.0.0-alpha.17
v5.0.0-alpha.18
v5.0.0-alpha.19

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-27773.json"