Medium severity · published Apr 6, 2026
CVE-2026-35404
Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter
6.1
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openedx-platform · openedx
< 76462f1e5fa9b37d2621ad7ad19514b403908970 · source: vendor
OP
Openedx · Openedx
through 2026-04-02 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35404
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35404
Patch
https://github.com/openedx/openedx-platform/commit/76462f1e5fa9b37d2621ad7ad19514b403908970
Exploit
https://github.com/openedx/openedx-platform/security/advisories/GHSA-2843-x998-f8r2
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