CVE-2026-40487

CVE-2026-40487 - Postiz = 2.21.5 - Arbitrary File Upload via MIME-Type Spoofing to Stored XSS to Account Takeover Discovered & reported by: Astaruf Full writeup: https://nstsec.com/en/posts/postiz-xss-cve-2026-40487/ NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-40487 GHSA entry:...

CVE-2026-2942

ProSolution WP Client — Unauthenticated File Upload & RCE Scanner Plugin: prosolution-wp-client Affected Version: Vulnerability Type: Unauthenticated Arbitrary File Upload → Remote Code Execution Risk Level: 🔴 Critical CVSS 9.8 Requirement: Public page containing prosolfrontend shortcode 📌 About...

CVE-2018-11736

CVE-2018-11736 PHP RCE Exploit Pluck CMS Disclaimer ⚠️: This exploit was developed in Rust primarily as an introductory programming learning exercise. Please excuse any lack of technical rigor or non-idiomatic code patterns. Also, this is not my discovery; I relied on official reports to write thi...

GHSA-JHPH-5Q74-PMFX Snipe-IT vulnerable to stored XSS via inline-served attachment

Impact A low-privilege user can store an active-content payload as an asset attachment and have it served inline, same-origin, with an active Content-Type, achieving stored XSS. The application sanitizes uploads only when PHP finfo detects image/svg+xml. By submitting an XHTML document whose finf...

CVE-2026-38526

CVE-2026-38526 - Krayin CRM PHP Upload RCE Automatisierter Exploit für Krayin CRM ≤ 2.2.x. Dieses Skript nutzt eine Schwachstelle für uneingeschränkten Dateiupload im TinyMCE-Endpunkt /admin/tinymce/upload aus, umgeht die MIME-Typ-Validierung durch Vortäuschung von image/jpeg, lädt eine...

PT-2026-78652

Name of the Vulnerable Software and Affected Versions Wekan versions prior to 9.90 Description An issue exists where the isFileValid function in models/fileValidation.js relies on the Unix file command for content-based MIME detection. When the file binary is unavailable, the detectMimeFromFile...

Exploit for CVE-2026-2942

CVE-2026-2942 ProSolution WP Client — Unauthenticated File U...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

CVE-2026-33193

Docmost is open-source collaborative wiki and documentation software. Versions prior to 0.70.0 are vulnerable to a stored cross-site scripting XSS attack due to improper handling of MIME type spoofing GHSL-2026-052. An attacker could exploit this flaw to inject malicious scripts, potentially...

CVE-2026-33193

Docmost is open-source collaborative wiki and documentation software. Versions prior to 0.70.0 are vulnerable to a stored cross-site scripting XSS attack due to improper handling of MIME type spoofing GHSL-2026-052. An attacker could exploit this flaw to inject malicious scripts, potentially...

CVE-2026-33193

Docmost is an open-source collaborative wiki; versions prior to 0.70.0 are affected by a stored XSS due to improper MIME-type handling (GHSL-2026-052). The vulnerability allows an attacker to inject scripts, potentially compromising user data. A patch is available in version 0.70.0. The CVSS vect...

CVE-2026-32931

CVE-2026-32931: Chamilo LMS has an unrestricted file upload vulnerability in the exercise sound upload function. Before versions 1.11.38 and 2.0.0-RC.3, an authenticated teacher could spoof Content-Type to audio/mpeg, upload a PHP webshell with its original .php extension into a web-accessible di...

CVE-2026-33221 Nhost Storage Affected by MIME Type Spoofing via Trusted Client Content-Type Header in Storage Upload

Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.12.0, the storage service's file upload handler trusts the client-provided Content-Type header without performing server-side MIME type detection. This allows an attacker to upload files with an arbitrary MIME type,...

CVE-2026-33221 Nhost Storage Affected by MIME Type Spoofing via Trusted Client Content-Type Header in Storage Upload

Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.12.0, the storage service's file upload handler trusts the client-provided Content-Type header without performing server-side MIME type detection. This allows an attacker to upload files with an arbitrary MIME type,...

CVE-2026-30821 Flowise: Arbitrary File Upload via MIME Spoofing

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.0.13, the /api/v1/attachments/:chatflowId/:chatId endpoint is listed in WHITELISTURLS, allowing unauthenticated access to the file upload API. While the server validates uploads based on th...

CVE-2026-30821

Flowise prior to 3.0.13 is vulnerable to Arbitrary File Upload via MIME spoofing on the /api/v1/attachments/:chatflowId/:chatId endpoint. The server trusts the client-provided Content-Type (file.mimetype) and does not verify file content or extension, so an attacker can upload malicious files by ...

CVE-2026-30821 Flowise: Arbitrary File Upload via MIME Spoofing

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.0.13, the /api/v1/attachments/:chatflowId/:chatId endpoint is listed in WHITELISTURLS, allowing unauthenticated access to the file upload API. While the server validates uploads based on th...

CVE-2026-30821 Flowise: Arbitrary File Upload via MIME Spoofing

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.0.13, the /api/v1/attachments/:chatflowId/:chatId endpoint is listed in WHITELISTURLS, allowing unauthenticated access to the file upload API. While the server validates uploads based on th...

GHSA-J8G8-J7FC-43V6 Flowise has Arbitrary File Upload via MIME Spoofing

Vulnerability Description --- Vulnerability Overview - The /api/v1/attachments/:chatflowId/:chatId endpoint is listed in WHITELISTURLS, allowing unauthenticated access to the file upload API. - While the server validates uploads based on the MIME types defined in...

Flowise has Arbitrary File Upload via MIME Spoofing

Vulnerability Description --- Vulnerability Overview - The /api/v1/attachments/:chatflowId/:chatId endpoint is listed in WHITELISTURLS, allowing unauthenticated access to the file upload API. - While the server validates uploads based on the MIME types defined in...