CVE-2026-42857

Katalog CVE

CVSS 5.4 · Medium EPSS 0,26%

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

Deskripsi (NVD)

Open edX Platform enables the authoring and delivery of online learning at any scale. The HTML sanitizer clean_thread_html_body() used for discussion notification emails fails to remove <style> tags from user-generated discussion post content. This content is rendered with Django's |safe template filter in email notification templates, allowing any enrolled student to inject arbitrary CSS into email notifications sent to other users. This enables email tracking (IP address disclosure), content spoofing, and phishing attacks. This vulnerability is fixed with commit cddc25cd791bb78f76833896e4778f668861df12.

Rincian

Terbit di NVD

11 Mei 2026

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)

0,26% peluang dieksploitasi; lebih tinggi dari 16,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/openedx/openedx-platform/security/advisories/GHSA-4xv3-5j4x-q8g4 exploit · advisory vendor
• https://github.com/openedx/openedx-platform/commit/cddc25cd791bb78f76833896e4778f668861df12 patch