CVE-2026-39963

Katalog CVE

CVSS 6.9 · Medium EPSS 0,30%

Kerentanan Reliance on Cookies without Validation and Integrity Checking pada s9y serendipity. Skor CVSS 3.1 6.9 (Medium) menurut github.com.

Deskripsi (NVD)

Serendipity is a PHP-powered weblog engine. In versions 2.6-beta2 and below, the serendipity_setCookie() function in include/functions_config.inc.php uses $_SERVER['HTTP_HOST'] without validation as the domain parameter of setcookie(). An attacker who can influence the Host header at login time, such as via MITM, reverse proxy misconfiguration, or load balancer manipulation, can force authentication cookies including session tokens and auto-login tokens to be scoped to an attacker-controlled domain. This enables session fixation, token leakage to attacker-controlled infrastructure, and privilege escalation if an admin logs in under a poisoned Host header. This issue has been fixed in version 2.6.0.

Rincian

Terbit di NVD

15 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-565: Reliance on Cookies without Validation and Integrity Checking

EPSS (30 hari)

0,30% peluang dieksploitasi; lebih tinggi dari 20,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/s9y/Serendipity/security/advisories/GHSA-4m6c-649p-f6gf exploit · mitigasi · advisory vendor
• https://github.com/s9y/Serendipity/releases/tag/2.6.0 product