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    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.

    Published:Dec 2, 2024
    Last Modified:Apr 15, 2026
    EPS:Dec 2, 2024
    EPSS Score:0.00134
    CVSS Score:8.3

    Affected Products

    Vendor
    Simplesamlphp
    Product
    Saml2

    Exploits

    https://github.com/heartlesseorg-dot/CVE-2024-52806-PoC

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-221 Data Serialization External Entities Blowup

    Related CVEs

    CVE-2026-49289 (CVSS 7.5) — The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. In 4.19.2 and 4.20.2, the li…
    CVE-2026-49283 (CVSS 8.7) — The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.19.3, 4.…
    CVE-2025-27773 (CVSS 8.6) — The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and…
    CVE-2023-49087 (CVSS 6.8) — xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requir…
    CVE-2018-7711 (CVSS 8.1) — HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values i…
    CVE-2018-6519 (CVSS 7.5) — The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Express…
    CVE-2016-9814 (CVSS 9.1) — The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High