CVE-2021-43855

Katalog CVE

CVSS 5.4 · Medium EPSS 0,89%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada requarks wiki.js. Skor CVSS 3.1 5.4 (Medium) menurut NVD.

Deskripsi (NVD)

Wiki.js is a wiki app built on node.js. Wiki.js 2.5.263 and earlier is vulnerable to stored cross-site scripting through a SVG file upload made via a custom request with a fake MIME type. By creating a crafted SVG file, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the SVG is viewed directly by other users. Scripts do not execute when loaded inside a page via normal `<img>` tags. The malicious SVG can only be uploaded by crafting a custom request to the server with a fake MIME type. A patch in version 2.5.264 fixes this vulnerability by adding an additional file extension verification check to the optional (enabled by default) SVG sanitization step to all file uploads that match the SVG mime type. As a workaround, disable file upload for all non-trusted users.

Rincian

Terbit di NVD

27 Desember 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

5.4 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/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)

0,89% peluang dieksploitasi; lebih tinggi dari 58,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/Requarks/wiki/commit/57b56d3a5b9c00358814e76f3ee5b4bb353ad62f patch · advisory pihak ketiga
• https://github.com/Requarks/wiki/security/advisories/GHSA-4893-pj5w-3hq9 exploit · patch · advisory pihak ketiga
• https://github.com/Requarks/wiki/releases/tag/2.5.264 release notes · advisory pihak ketiga