CVE-2026-91134 Discourse: Block post iframes whose encoded userinfo bypasses the allowed_iframes allowlist

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the Discourse post sanitizer allowed a stored cross-origin iframe to bypass the allowediframes prefix policy when the iframe src contained encoded userinfo. The sanitizer validated a decoded form...

CVE-2026-91134 Discourse: Block post iframes whose encoded userinfo bypasses the allowed_iframes allowlist

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the Discourse post sanitizer allowed a stored cross-origin iframe to bypass the allowediframes prefix policy when the iframe src contained encoded userinfo. The sanitizer validated a decoded form...

CVE-2026-91134

The open-source discussion platform Discourse contains a vulnerability in its post sanitizer prior to versions 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0 . The root cause is a logic flaw where the sanitizer validates a decoded form of an iframe src differently than how the browser interprets it. ...

Hacked Ukrainian Sites Serve Fake Cloudflare ClickFix Lures for Psychedelic Stealer

An active ClickFix campaign has been observed compromising legitimate Ukrainian business websites to inject bogus Cloudflare verification pages and trick victims into downloading a previously undocumented information stealer called Psychedelic. "When a visitor interacts with the page, the lure...

CVE-2026-84151

The Post Grid WordPress plugin before 7.9.5 does not limit an expansion of the WordPress allowed-HTML list to its own markup and applies it site-wide, allowing users with the Contributor role and above to store iframe, style and input elements that are normally stripped from their content, leadin...

CVE-2026-84151

The Post Grid WordPress plugin versions prior to 7.9.5 is vulnerable to HTML injection due to an improper limitation of the WordPress allowed-HTML list. Specifically, the plugin fails to restrict the expansion of this list to its own markup, applying it site-wide. This allows users with the Contr...

EUVD-2026-85800

The Post Grid WordPress plugin before 7.9.5 does not limit an expansion of the WordPress allowed-HTML list to its own markup and applies it site-wide, allowing users with the Contributor role and above to store iframe, style and input elements that are normally stripped from their content, leadin...

CVE-2026-84151 The Post Grid < 7.9.5 - Contributor+ Stored HTML/iframe Injection via wp_kses_post Allow-List Widening

The Post Grid WordPress plugin before 7.9.5 does not limit an expansion of the WordPress allowed-HTML list to its own markup and applies it site-wide, allowing users with the Contributor role and above to store iframe, style and input elements that are normally stripped from their content, leadin...

CVE-2026-84151 The Post Grid < 7.9.5 - Contributor+ Stored HTML/iframe Injection via wp_kses_post Allow-List Widening

The Post Grid WordPress plugin before 7.9.5 does not limit an expansion of the WordPress allowed-HTML list to its own markup and applies it site-wide, allowing users with the Contributor role and above to store iframe, style and input elements that are normally stripped from their content, leadin...

WordPress The Post Grid plugin < 7.9.5 - Contributor+ Stored HTML/iframe Injection vulnerability

Contributor+ Stored HTML/iframe Injection vulnerability discovered by Revanth Hari Narayana Matte in WordPress Plugin The Post Grid versions 7.9.5...

PT-2026-98160

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.1.8 Discourse versions prior to 2026.6.3 Discourse versions prior to 2026.7.2 Discourse versions prior to 2026.8.0 Description The iframe src traversal guard fails to treat literal backslashes as path separator...

PT-2026-98154

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.1.8 Discourse versions prior to 2026.6.3 Discourse versions prior to 2026.7.2 Discourse versions prior to 2026.8.0 Description The post sanitizer allows a stored cross-origin iframe to bypass the allowed iframe...

CVE-2026-91132: Origin Validation Error

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, sites using wildcard patterns in the allowediframes setting could accept a crafted iframe URL whose allowlisted suffix appeared after a URL authority separator. The wildcard origin check matched...

CVE-2026-91134: Improper Input Validation

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the Discourse post sanitizer allowed a stored cross-origin iframe to bypass the allowediframes prefix policy when the iframe src contained encoded userinfo. The sanitizer validated a decoded form...

CVE-2026-61823: Improper Neutralization of Input During Web Page Generation

code16 Sharp is a Laravel-based framework for building content-management and administrative interfaces. Versions before 9.22.5 contain a stored cross-site scripting vulnerability in the rich-text editor because the HTML sanitizer permits the srcdoc attribute on iframe elements. Although markup...

CVE-2026-57440: Improper Neutralization of Input During Web Page Generation

The EmbedVideo Extension is a MediaWiki extension which adds a parser function called ev and various parser tags for embedding video clips from various video sharing services. Prior to 4.1.0, with $wgEmbedVideoRequireConsent disabled not the default, the urls for videos are passed into an iframe...

PT-2026-98161

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.1.8 Discourse versions prior to 2026.6.3 Discourse versions prior to 2026.7.2 Discourse versions prior to 2026.8.0 Description Sites using wildcard patterns in the allowed iframes setting may accept a crafted...

PT-2026-98241

Name of the Vulnerable Software and Affected Versions EmbedVideo Extension versions prior to 4.1.0 Description When the $wgEmbedVideoRequireConsent variable is disabled, video URLs are passed into an iframe src attribute without proper sanitization. This allows an attacker to use a malformed URL ...

PT-2026-97711

Name of the Vulnerable Software and Affected Versions The Post Grid versions prior to 7.9.5 Description The plugin fails to limit the expansion of the WordPress allowed-HTML list to its own markup, applying the change site-wide. This allows users with the Contributor role and above to store ifram...

CVE-2026-91123: Improper Limitation of a Pathname to a Restricted Directory

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the iframe src traversal guard did not treat literal backslashes as path separators after decoded dot segments. A crafted source could therefore pass an allowediframes subpath check while browser...