CVE-2026-33979

CVE-2026-33979 affects the Express XSS Sanitizer middleware (Express 4.x/5.x). The root cause is that, in versions prior to 2.0.2, explicitly provided empty configurations for allowedTags or allowedAttributes are ignored, causing a fallback to sanitize-html’s permissive defaults. This leads to a ...

CVE-2026-33979 Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)

Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data in req.body, req.query, req.headers and req.params to prevent Cross Site Scripting XSS attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are...

CVE-2026-33979 Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)

Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data in req.body, req.query, req.headers and req.params to prevent Cross Site Scripting XSS attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are...

CVE-2026-33979 Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)

Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data in req.body, req.query, req.headers and req.params to prevent Cross Site Scripting XSS attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are...

CVE-2026-33979

Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data in req.body, req.query, req.headers and req.params to prevent Cross Site Scripting XSS attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are...

EUVD-2026-16876

Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization XSS risk...

Permissive List of Allowed Inputs

Overview express-xss-sanitizer is an Express 4.x middleware which sanitizes user input data in req.body, req.query, req.headers and req.params to prevent Cross Site Scripting XSS attack. Affected versions of this package are vulnerable to Permissive List of Allowed Inputs through the...

GHSA-3843-RR4G-M8JQ Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)

Description A vulnerability has been identified in express-xss-sanitizer , , , etc. and attributes e.g., href on . This behavior violates the expected API contract and may lead to security issues such as content injection or XSS, depending on how the sanitized output is used. Impact Developers...

Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)

Description A vulnerability has been identified in express-xss-sanitizer , , , etc. and attributes e.g., href on . This behavior violates the expected API contract and may lead to security issues such as content injection or XSS, depending on how the sanitized output is used. Impact Developers...

CVE-2026-4389

The DSGVO snippet for Leaflet Map and its Extensions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the leafext-cookie-time and leafext-delete-cookie shortcodes in all versions up to, and including, 3.1. This is due to insufficient input sanitization and output escaping on...

PT-2026-28581

Name of the Vulnerable Software and Affected Versions Express XSS Sanitizer versions prior to 2.0.2 Express XSS Sanitizer versions 4.x and 5.x Description Express XSS Sanitizer, middleware for Express 4.x and 5.x, sanitizes user input data in req.body, req.query, req.headers, and req.params to...

CVE-2026-0819

A stack buffer overflow vulnerability exists in wolfSSL's PKCS7 SignedData encoding functionality. In wcPKCS7BuildSignedAttributes, when adding custom signed attributes, the code passes an incorrect capacity value esd-signedAttribsCount to EncodeAttributes instead of the remaining available space...

CVE-2026-30841

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.6.2, passwordreset.php outputs $GET"token" and $GET"email" directly into HTML input value attributes using and without calling htmlspecialchars. This allows reflected XSS by breaking out of the attribute...

CVE-2026-33311

DiceBear is an avatar library for designers and developers. Starting in version 5.0.0 and prior to versions 5.4.4, 6.1.4, 7.1.4, 8.0.3, and 9.4.1, SVG attribute values derived from user-supplied options backgroundColor, fontFamily, textColor were not XML-escaped before interpolation into SVG...

CVE-2026-31815

Unicorn adds modern reactive component functionality to your Django templates. Prior to 0.67.0, component state manipulation is possible in django-unicorn due to missing access control checks during property updates and method calls. An attacker can bypass the intended ispublic protection to modi...

CVE-2026-4084

The fyyd podcast shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'fyyd-podcast', 'fyyd-episode', and 'fyyd' shortcodes in all versions up to, and including, 0.3.1. This is due to insufficient input sanitization and output escaping on user-supplied shortcode...

CVE-2026-4086

The WP Random Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'cat', 'nocat', and 'text' shortcode attributes of the 'wprandombutton' shortcode in all versions up to, and including, 1.0. This is due to insufficient input sanitization and output escaping on...

Cross-site Scripting (XSS)

Angular is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to internationalization of security-sensitive attributes bypassing Angular’s sanitization when combined with untrusted data binding, which allows an attacker to inject malicious scripts...

CVE-2026-4075 BWL Advanced FAQ Manager Lite <= 1.1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'sbox_id' Shortcode Attribute

The BWL Advanced FAQ Manager Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'bafsbox' shortcode in all versions up to and including 1.1.1. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes such as 'sboxid',...

PT-2026-28200

The Simple Download Counter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sdc menu' shortcode in all versions up to, and including, 2.3. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes, specifically the 'text' a...