CVE-2026-55087

Katalog CVE

CVSS 6.1 · Medium EPSS 0,58%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). Skor CVSS 3.1 6.1 (Medium) menurut github.com.

Deskripsi (NVD)

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad uses the attacker-controlled x-proxy-path request header in src/node/hooks/express/admin.ts when substituting paths into HTML, JavaScript, and CSS under /admin without sanitization, Vary: x-proxy-path, or Cache-Control: private, no-store. A shared proxy or CDN can cache the resulting response and serve attacker-injected script to an administrator. In src/node/hooks/express/specialpages.ts, version 3.0.0 also accepts a protocol-relative x-proxy-path value when constructing the /p/:pad/timeslider redirect, allowing redirection to an attacker-controlled host. The issues are exploitable when the deployment permits client-supplied x-proxy-path headers to reach Etherpad. This issue is fixed in version 3.1.0.

Rincian

Terbit di NVD

19 Agustus 2026

Terakhir diubah

9 September 2026

Status NVD

Deferred

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

EPSS (30 hari)

0,58% peluang dieksploitasi; lebih tinggi dari 46,1% 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/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996
• https://github.com/ether/etherpad/pull/7784
• https://github.com/ether/etherpad/security/advisories/GHSA-fjgc-3mj7-8rg8
• https://github.com/ether/etherpad/tree/3.1.0