| Package | Affected versions | Patched versions |
|---|---|---|
| simplesamlphp/saml2 | ≥ 2.0, < 2.3.7≥ 3.0, < 3.1.3< 1.10.5 | 2.3.73.1.31.10.5 |
| simplesamlphp | < 1.15.3 | 1.15.3 |
The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.
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