npm: Parse Server vulnerable to stored XSS via malformed Content-Type bypassing file upload extension blocklist

npm: Parse Server vulnerable to stored XSS via malformed Content-Type bypassing file upload extension blocklist vulnerability discovered by ? in WordPress npm parse-server versions = 8.6.83...

CVE-2026-103999

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via File Upload in all versions up to, and including, 3.5.54 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary w...

EUVD-2026-102660

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via File Upload in all versions up to, and including, 3.5.54 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary w...

CVE-2026-103999

The Ultra Addons for Contact Form 7 WordPress plugin is vulnerable to Stored Cross-Site Scripting (XSS) in all versions up to and including 3.5.54 . The root cause is insufficient input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts. Attackers...

CVE-2026-103999: Improper Neutralization of Input During Web Page Generation

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via File Upload in all versions up to, and including, 3.5.54 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary w...

PT-2026-115445

Name of the Vulnerable Software and Affected Versions Ultra Addons for Contact Form 7 versions prior to 3.5.55 Description Stored Cross-Site Scripting XSS occurs due to insufficient input sanitization and output escaping during file uploads. Unauthenticated attackers can inject arbitrary web...

CVE-2026-84803

SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in asset serving due to an incomplete extension blocklist that misses script-capable file types. Attackers can upload files with extensions like .xht, .ehtml, .xsl, .xbl, or .rdf that resolve to executable media types and...

EUVD-2026-69915

SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in asset serving due to an incomplete extension blocklist that misses script-capable file types. Attackers can upload files with extensions like .xht, .ehtml, .xsl, .xbl, or .rdf that resolve to executable media types and...

CVE-2026-84803

SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in asset serving due to an incomplete extension blocklist that misses script-capable file types. Attackers can upload files with extensions like .xht, .ehtml, .xsl, .xbl, or .rdf that resolve to executable media types and...

PT-2026-84676

SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in asset serving due to an incomplete extension blocklist that misses script-capable file types. Attackers can upload files with extensions like .xht, .ehtml, .xsl, .xbl, or .rdf that resolve to executable media types and...

CVE-2026-55778 Parse Server: Stored XSS via non-standard file extension bypassing file upload extension blocklist

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.11 and 8.6.81, the default fileUpload.fileExtensions blocklist could be bypassed by uploading a file with a non-standard or compound extension and dangerous content type,...

CVE-2026-55778 Parse Server: Stored XSS via non-standard file extension bypassing file upload extension blocklist

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.11 and 8.6.81, the default fileUpload.fileExtensions blocklist could be bypassed by uploading a file with a non-standard or compound extension and dangerous content type,...

NPM: parse-server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist

NPM: parse-server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist vulnerability discovered by ? in WordPress Npm parse-server versions = 8.6.78...

parse-server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist

Impact The default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose extension would otherwise be blocked e.g. poc.svg.. The trailing dot causes the extension parser to extract an empty string, which short-circuits the blocklist check, and the...

EUVD-2026-36539

parse-server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist...

GHSA-7WQV-XJF3-X35V parse-server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist

Impact The default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose extension would otherwise be blocked e.g. poc.svg.. The trailing dot causes the extension parser to extract an empty string, which short-circuits the blocklist check, and the...

BIT-PARSE-2026-53724 Parse Server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.79 and 9.9.1, the default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose extension would otherwise be blocked e.g. poc.svg...

Cross-site Scripting (XSS)

Overview parse-server is a version of the Parse backend that can be deployed to any infrastructure that can run Node.js. Affected versions of this package are vulnerable to Cross-site Scripting XSS through the FilesController.createFile and FilesRouter file-extension handling in the file upload...

CVE-2026-53724 Parse Server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.79 and 9.9.1-alpha.4, the default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose extension would otherwise be blocked e.g...

CVE-2026-53724 Parse Server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.79 and 9.9.1-alpha.4, the default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose extension would otherwise be blocked e.g...