CVE-2025-27773

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Source
https://nvd.nist.gov/vuln/detail/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
2025-11-28T02:35:05.046472Z
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 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27773.json",
    "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
bdf16d1021363a0819c35806124a20e74a78c2c9
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.17.0"
        }
    ]
}
Type
GIT
Repo
https://github.com/simplesamlphp/saml2
Events
Introduced
94d4c0736656b8fb7390cc6258b692f84ed5bae5
Fixed
d35d41ba4b47b083b53d87fc541d5336c8743916
Database specific 
{
    "versions": [
        {
            "introduced": "5.0.0-alpha.1"
        },
        {
            "fixed": "5.0.0-alpha.20"
        }
    ]
}