CVE-2026-40487

Katalog CVE

CVSS 9.0 · Critical EPSS 0,26%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada gitroom postiz. Skor CVSS 3.1 9.0 (Critical) menurut NVD.

Deskripsi (NVD)

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 Content-Type derived from their original extension (`text/html`, `image/svg+xml`), enabling Stored Cross-Site Scripting (XSS) in the context of the application's origin. This can lead to session riding, account takeover, and full compromise of other users' accounts. Version 2.21.6 contains a fix.

Rincian

Terbit di NVD

18 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

9.0 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-345: Insufficient Verification of Data Authenticity
CWE-434: Unrestricted Upload of File with Dangerous Type

EPSS (30 hari)

0,26% peluang dieksploitasi; lebih tinggi dari 15,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-44wg-r34q-hvfx exploit · advisory vendor
• https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.6 product · release notes