Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openedx | Openedx | <= 2026-04-02 |
Related Weaknesses (CWE)
References
- https://github.com/openedx/openedx-platform/commit/76462f1e5fa9b37d2621ad7ad1951Patch
- https://github.com/openedx/openedx-platform/security/advisories/GHSA-2843-x998-fExploitVendor Advisory
FAQ
What is CVE-2026-35404?
CVE-2026-35404 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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() wi...
How severe is CVE-2026-35404?
CVE-2026-35404 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-35404?
Check the references section above for vendor advisories and patch information. Affected products include: Openedx Openedx.