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CVE-2026-55596

Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript

Plate is a rich-text editor with AI and shadcn/ui. From 53.0.0 until 53.1.4, the media embed renderer trusts serialized provider or sourceUrl metadata in useMediaState and skips parseMediaUrl protocol validation, allowing a crafted Plate document to set a known video provider while keeping url as a javascript: iframe source that the registry MediaEmbedElement renders directly as an iframe src when a victim opens the document. This issue is fixed in version 53.1.4.

CVSS 3.1 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Udecode
Products
Plate
CVE-2026-56359

n8n - Cross-Site Scripting in Credential Management OAuth2 Authorization URL

n8n before 2.8.0 contains a cross-site scripting vulnerability in the credential management flow where authenticated users can inject malicious JavaScript URLs into OAuth2 credential Authorization URL fields. Attackers can craft malicious credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in their browser session with the victim's privileges.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
N8n
Products
N8n
CVE-2025-12799

Jastow: jastow cross-site scripting attack due to unsanitized uri

A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting (XSS) attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Jboss Enterprise Application Platform Jbosseapxp Red Hat Single Sign On
CVE-2026-13441

EventPrime <= 4.3.4.2 - Unauthenticated Stored Cross-Site Scripting via 'new_event_type_background_color' Parameter

The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Metagauss Wordpress
Products
Eventprime – Events Calendar, Bookings And Tickets Wordpress
CVE-2026-59926

Mistune: XSS via unescaped class option in Admonition directive

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, render_admonition() in src/mistune/directives/admonition.py concatenates the Admonition directive :class: option into the HTML class attribute without escaping, allowing attribute injection and cross-site scripting even when HTMLRenderer escape mode is enabled. This issue is fixed in version 3.2.1.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Lepture Mistune Project
Products
Mistune Mistune
CVE-2026-7839

UltraVNC repeater ships hardcoded default admin password allowing unauthenticated admin access

UltraVNC repeater through 1.8.2.2 initializes the HTTP administration server with a hardcoded default password. In repeater/webgui/settings.c:197, when settings2.txt is absent on first run the repeater writes the literal string "adminadmi2" as the admin password via strcpy_s(saved_password, 64, "adminadmi2"). The HTTP Basic-auth handler wi_decode_auth() checks this password without rate-limiting or lockout. Any remote attacker who can reach the repeater HTTP port (default TCP 80) can authenticate as administrator using the well-known default credential on a fresh or unmodified installation, gaining full control of the repeater configuration including allow/deny rules and session visibility.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Uvnc
Products
Ultravnc
CVE-2026-47281

Visual Studio Code Elevation of Privilege Vulnerability

Missing authorization in Visual Studio Code allows an unauthorized attacker to elevate privileges over a network.

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
Visual Studio Code
CVE-2026-50740

Reflected XSS via zone‑include.php Refresh Parameter in Revive Adserver 6.0.7 and Earlier

A missing sanitisation vulnerability of user input in the zone-include.php script exists in Revive Adserver 6.0.7 and earlier. A low‑privileged user could exploit the refresh parameter of the iFrame invocation tag to perform reflected XSS attacks.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Revive Revive-adserver
Products
Adserver Revive Adserver
CVE-2026-53641

FOSSBilling has stored XSS in client email views via unescaped content in JavaScript template literal

FOSSBilling is a free, open-source billing and client management system. Versions 0.6.0 through 0.7.2 have a stored cross-site scripting (XSS) vulnerability in the client-facing email history views of FOSSBilling. Email HTML content (`content_html`) is rendered into a JavaScript template literal using the `|raw` filter, bypassing all output escaping. An attacker with admin access can inject malicious JavaScript payloads into email content that execute in the browser of any client who views their email history. Version 0.8.0 contains a fix. Some workarounds are available. Restrict admin account access, audit email content in the database for suspicious payloads, and/or monitor client accounts for unusual activity.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Fossbilling
Products
Fossbilling
CVE-2026-6818

VikBooking Hotel Booking Engine & PMS <= 1.8.8 - Unauthenticated Stored Cross-Site Scripting via 'special_requests' Parameter

The VikBooking Hotel Booking Engine & PMS plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'special_requests' parameter in all versions up to, and including, 1.8.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
—
Products
—
CVE-2026-57439

CyberChef: Prototype pollution in Series Chart operation

CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.2.0, the Series Chart operation accepts __proto__ as a key while parsing user-supplied CSV, allowing prototype pollution that can be chained with operations such as Parse UDP to inject malicious JavaScript into HTML output. This issue is fixed in version 11.2.0.

CVSS 3.1 · 5 Medium EPSS < 1% KEV · Not listed
Vendors
Gchq
Products
Cyberchef