CVE-2026-12281
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
The Shibboleth WordPress plugin before version 2.5.4 does not fail closed when its HTTP header identity mode is enabled without an anti-spoofing key, treating any request carrying identity headers as an authenticated session without verifying them.
Risk Assessment
On a deployment where untrusted client headers reach the application, an unauthenticated attacker can log in with forged identity headers. With automatic account creation and default administrator role mapping enabled, they can create and sign in as a new administrator, gaining full control.
Recommendation
Immediately update the Shibboleth plugin to version 2.5.4 or later. Additionally, configure an anti-spoofing key for the HTTP header mode and ensure untrusted client headers are stripped before reaching the application.
Related vulnerabilities
- CVE-2026-89126Critical
SAP Web Dispatcher does not sufficiently validate certain network input processed by an internal component. An unauthenticated attacker could send specially crafted network traffic to trigger memory corruption, potentially leading to arbitrary code execution and full system compromise.
- CVE-2026-89119Critical
SAP Web Dispatcher and SAP NetWeaver Application Server ABAP (Internet Communication Manager) do not perform sufficient request validation in certain administrative functionality. An unauthenticated attacker could trick a logged-on administrator into visiting a malicious link, causing unintended actions in the administrator's session and potentially leading to full compromise of the underlying operating system.
- CVE-2026-89103Critical
SAP Gateway activates the default Access Control List with high privileges, allowing categorization of an external attacker as an internal application server. An unauthenticated attacker with network access to SAP Gateway could exploit this weakness to perform unauthorized actions within the application environment.
- CVE-2026-76965Critical
SAP NetWeaver Application Server ABAP and ABAP Platform do not perform necessary authorization checks for certain internal functionality. An attacker with low privileges could invoke the affected functionality to execute arbitrary operating system commands on the underlying host.
- CVE-2026-76964Critical
SAP NetWeaver Application Server ABAP does not sufficiently validate certain network input processed by an internal component. An unauthenticated attacker could send specially crafted network traffic to trigger memory corruption, potentially leading to arbitrary code execution and full system compromise.
- CVE-2026-125086Critical
D-Link M60 1.12.B01 contains hard-coded credentials in the /etc/emDaemon/mosquitto.conf file of the emDaemon MQTT Broker component. The vulnerability can be exploited remotely, and a public exploit may already be in use.
- CVE-2026-124600Critical
GV-Face transmits sensitive user credentials and related authentication data over unencrypted HTTP connections. The HTTP traffic is not encrypted, allowing an attacker to intercept it.
- CVE-2026-120017Critical
SAP NetWeaver AS ABAP and ABAP Platform do not sufficiently verify incoming authentication assertions under certain configurations. An unauthenticated attacker could submit crafted data to bypass authentication and impersonate arbitrary users, including privileged accounts.
- CVE-2026-109803Critical
SAP NetWeaver Knowledge Management (XML Forms) does not sufficiently restrict the selection of XSL transformations processed by the affected functionality. An authenticated user with access could cause an unauthorized XSL transformation to be processed, potentially leading to arbitrary code execution in the application context.
- CVE-2026-109798Critical
SAP BusinessObjects Business Intelligence Platform (Web Intelligence) does not properly restrict external entity resolution when processing OLAP connection requests. An authenticated attacker could access restricted resources, read sensitive files on the server, and reach internal systems.
Original NVD description (English source)
The Shibboleth WordPress plugin before 2.5.4 does not fail closed when its HTTP header identity mode is enabled without an anti-spoofing key, treating any request that carries identity headers as an authenticated session without verifying them. On a deployment where untrusted client headers reach the application, an unauthenticated attacker can log in with forged identity headers and, when automatic account creation and the default administrator role mapping are enabled, create and sign in as a new administrator. Exploitation requires the non-default HTTP header attribute mode, an empty or absent spoof key, automatic account creation enabled, and a deployment that does not strip untrusted client headers before they reach the application.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS