SAML | Breaking Cybersecurity News | The Hacker News

Fortinet has officially confirmed that it's working to completely plug a FortiCloud SSO authentication bypass vulnerability following reports of fresh exploitation activity on fully-patched firewalls. "In the last 24 hours, we have identified a number of cases where the exploit was to a device that had been fully upgraded to the latest release at the time of the attack, which suggested a new attack path," Fortinet Chief Information Security Officer (CISO) Carl Windsor said in a Thursday post. The activity essentially mounts to a bypass for patches put in place by the network security vendor to address CVE-2025-59718 and CVE-2025-59719 , which could allow unauthenticated bypass of SSO login authentication via crafted SAML messages if the FortiCloud SSO feature is enabled on affected devices. The issues were originally addressed by Fortinet last month. However, earlier this week, reports emerged of renewed activity in which malicious SSO logins on FortiGate appliances...

Two high-severity security flaws have been disclosed in the open-source ruby-saml library that could allow malicious actors to bypass Security Assertion Markup Language (SAML) authentication protections. SAML is an XML-based markup language and open-standard used for exchanging authentication and authorization data between parties, enabling features like single sign-on (SSO), which allows individuals to use a single set of credentials to access multiple sites, services, and apps. The vulnerabilities, tracked as CVE-2025-25291 and CVE-2025-25292 , carry a CVSS score of 8.8 out of 10.0. They affect the following versions of the library - < 1.12.4 >= 1.13.0, < 1.18.0 Both the shortcomings stem from how both REXML and Nokogiri parse XML differently, causing the two parsers to generate entirely different document structures from the same XML input This parser differential allows an attacker to be able to execute a Signature Wrapping attack, leading to an authentication by...

GitHub has released fixes to address a set of three security flaws impacting its Enterprise Server product, including one critical bug that could be abused to gain site administrator privileges. The most severe of the shortcomings has been assigned the CVE identifier CVE-2024-6800, and carries a CVSS score of 9.5. "On GitHub Enterprise Server instances that use SAML single sign-on (SSO) authentication with specific IdPs utilizing publicly exposed signed federation metadata XML, an attacker could forge a SAML response to provision and/or gain access to a user account with site administrator privileges," GitHub said in an advisory. The Microsoft-owned subsidiary has also addressed a pair of medium-severity flaws - CVE-2024-7711 (CVSS score: 5.3) - An incorrect authorization vulnerability that could allow an attacker to update the title, assignees, and labels of any issue inside a public repository. CVE-2024-6337 (CVSS score: 5.9) - An incorrect authorization vulnerab...

Cybersecurity researchers have disclosed a new attack technique called  Silver SAML  that can be successful even in cases where mitigations have been applied against Golden SAML attacks. Silver SAML "enables the exploitation of SAML to launch attacks from an identity provider like Entra ID against applications configured to use it for authentication, such as Salesforce," Semperis researchers Tomer Nahum and Eric Woodruff  said  in a report shared with The Hacker News. Golden SAML (short for  Security Assertion Markup Language ) was  first documented  by CyberArk in 2017. The attack vector, in a nutshell, entails the abuse of the interoperable authentication standard to impersonate almost any identity in an organization. It's also similar to the  Golden Ticket attack  in that it grants attackers the ability to gain unauthorized access to any service in a federation with any privileges and to stay persistent in this environment in a stealth...