CVE-2025-27773

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...

Improper Verification of Cryptographic Signature

Overview Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature through the HTTPRedirect binding process. An attacker can manipulate the message processing by appending a malicious SAMLRequest in front of a valid SAMLResponse, leading to the applicati...

GHSA-46R4-F8GJ-XG56 The SimpleSAMLphp SAML2 library incorrectly verifies signatures for HTTP-Redirect binding

Summary There's 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. I believe that it exists for v4 only. I have not yet developed a PoC. V5 is well designed and...

The SimpleSAMLphp SAML2 library incorrectly verifies signatures for HTTP-Redirect binding

Summary There's 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. I believe that it exists for v4 only. I have not yet developed a PoC. V5 is well designed and...

CVE-2025-27773

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...

DEBIAN-CVE-2025-27773

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...

CVE-2025-27773 SimpleSAMLphp SAML2 library has incorrect signature verification for HTTP-Redirect binding

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...

CVE-2025-27773

CVE-2025-27773 affects the SimpleSAMLphp SAML2 library. A signature confusion attack exists in the HTTPRedirect binding where an attacker who has any signed SAMLResponse can cause the application to accept an unsigned message. This impacts versions prior to 4.17.0 and 5.0.0-alpha.20. The issue is...

CVE-2025-27773 SimpleSAMLphp SAML2 library has incorrect signature verification for HTTP-Redirect binding

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...

PT-2025-10892

Name of the Vulnerable Software and Affected Versions: SimpleSAMLphp SAML2 library versions prior to 4.17.0 and 5.0.0-alpha.20 Description: The issue is related to a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can...

CVE-2024-52806

SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. When loading an untrusted XML document, for example the SAMLResponse, it's possible to induce an XXE. This vulnerability is fixed in 4.6.14 and 5.0.0-alpha.18...

XML External Entity (XXE) Injection

simplesamlphp is vulnerable to XML External Entity XXE injection. The vulnerability is due to improper handling of untrusted XML input, which allows attackers to exploit maliciously crafted XML documents, such as SAMLResponse, to access sensitive information or perform other malicious activities...

XML External Entity

simplesamlphp/xml-common is vulnerable to XML External Entity XXE. The vulnerability is due to improper handling of untrusted XML input during document parsing, which allows an attacker to exploit external entity references to access sensitive data or perform denial-of-service attacks...

Debian: Security Advisory (DSA-5822-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Debian: Security Advisory (DLA-3981-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

GHSA-J5G2-Q29X-CW3H SimpleSAMLphp vulnerable to XXE in parsing SAML messages

Withdrawn Advisory This advisory has been withdrawn because the vulnerability affects users of the SimpleSAMLphp tarball, not the SimpleSAMLphp Composer package. The underlying information about CVE-2024-52596 is still valid. Original Description Summary When loading an untrusted XML document, fo...

GHSA-PXM4-R5PH-Q2M2 SimpleSAMLphp SAML2 has an XXE in parsing SAML messages

Summary When loading an untrusted XML document, for example the SAMLResponse, it's possible to induce an XXE. $options is defined as: https://github.com/simplesamlphp/saml2/blob/717c0adc4877ebd58428637e5626345e59fa0109/src/SAML2/DOMDocumentFactory.phpL41 including the DTDLoad option, which allows...

CVE-2024-52596

SimpleSAMLphp xml-common is a common classes for handling XML-structures. When loading an untrusted XML document, for example the SAMLResponse, it's possible to induce an XXE. This vulnerability is fixed in 1.19.0...

DEBIAN-CVE-2024-52806

SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. When loading an untrusted XML document, for example the SAMLResponse, it's possible to induce an XXE. This vulnerability is fixed in 4.6.14 and 5.0.0-alpha.18...

DEBIAN-CVE-2024-52596

SimpleSAMLphp xml-common is a common classes for handling XML-structures. When loading an untrusted XML document, for example the SAMLResponse, it's possible to induce an XXE. This vulnerability is fixed in 1.19.0...