CVE-2026-53591

Katalog CVE

CVSS 8.6 · High EPSS 0,38%

Kerentanan Improper Authentication. Skor CVSS 3.1 8.6 (High) menurut github.com.

Deskripsi (NVD)

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.223, an unauthenticated attacker can inject messages into any existing support conversation by sending a single email to the helpdesk's public address with a crafted `In-Reply-To` header. No credentials, tokens, or prior access are required. The injected message is rendered in the agent UI as a legitimate customer reply, the conversation is automatically reopened, and the `last_reply_from` field is set to the attacker's identity. Version 1.8.223 contains a fix.

Rincian

Terbit di NVD

20 Juli 2026

Terakhir diubah

21 Juli 2026

Status NVD

Deferred

CVSS 3.1

8.6 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-287: Improper Authentication

EPSS (30 hari)

0,38% peluang dieksploitasi; lebih tinggi dari 29,5% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-8vm3-wwq4-ggfx