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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| simplesamlphp/saml2(Packagist) | 0 | 4.17.0 | N/A |
| simplesamlphp/saml2(Packagist) | 5.0.0-alpha.1 | 5.0.0-alpha.20 | N/A |
| simplesamlphp/saml2-legacy(Packagist) | 0 | 4.17.0 | N/A |
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