What’s Vulnerable › Vulnerabilities

CVE-2026-35404: Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-06 · updated 2026-07-24
• Weakness: CWE-601

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

• openedx-platform: through 2026-04-02

References

• https://github.com/openedx/openedx-platform/commit/76462f1e5fa9b37d2621ad7ad19514b403908970
• https://github.com/openedx/openedx-platform/security/advisories/GHSA-2843-x998-f8r2

Get alerted when CVE-2026-35404 or the next vulnerability affects your stack