CVE-2021-37634

Katalog CVE

CVSS 6.1 · Medium EPSS 0,71%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada vapor leafkit. Skor CVSS 3.1 6.1 (Medium) menurut NVD.

Deskripsi (NVD)

Leafkit is a templating language with Swift-inspired syntax. Versions prior to 1.3.0 are susceptible to Cross-site Scripting (XSS) attacks. This affects anyone passing unsanitised data to Leaf's variable tags. Before this fix, Leaf would not escape any strings passed to tags as variables. If an attacker managed to find a variable that was rendered with their unsanitised data, they could inject scripts into a generated Leaf page, which could enable XSS attacks if other mitigations such as a Content Security Policy were not enabled. This has been patched in 1.3.0. As a workaround sanitize any untrusted input before passing it to Leaf and enable a CSP to block inline script and CSS data.

Rincian

Terbit di NVD

9 Agustus 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.1 (Medium), sumber NVD
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')

EPSS (30 hari)

0,71% peluang dieksploitasi; lebih tinggi dari 52,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/vapor/leaf-kit/security/advisories/GHSA-rv3x-xq3r-8j9h advisory pihak ketiga
• https://github.com/vapor/leaf-kit-ghsa-rv3x-xq3r-8j9h/pull/1 broken link