CVE-2026-35404CWE-601

Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter

Medium · published April 6, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
16.4
In the wild
Unconfirmed
What it is

Open edX Platform enables the authoring and delivery of online learning at any scale. The view_survey endpoint accepts a redirect_url GET parameter that is passed directly to HttpResponseRedirect() without any URL validation. When a non-existent survey name is provided, the server issues an immediate HTTP 302 redirect to the attacker-controlled URL. Additionally, the same unvalidated URL is embedded in a hidden form field and returned in a JSON response after form submission, where client-side JavaScript performs location.href = url. This enables phishing and credential theft attacks against authenticated Open edX users. This vulnerability is fixed with commit 76462f1e5fa9b37d2621ad7ad19514b403908970.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00257 · 16.4th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-04-06T21:22Z
EPSS history
Timeline
  • 06 APR 21:22Z
    Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter
    cvelistv5