Vulnerability · Published Apr 6, 2026 · Assigned by GitHub_M
CVE-2026-35404Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter
Medium 4.7
In plain English
A medium-severity open redirect in openedx-platform from openedx. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| openedx | openedx-platform | < 76462f1e5fa9b37d2621ad7ad19514b403908970 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N