CVE-2026-35404

MEDIUM EPSS 12.8%
Published Apr 6, 20262mo ago · Modified Jun 17, 20262w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Apr 6, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
12.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-601

Affected Products 1

VendorProductVersionRange
openedxopenedx* ≤2026-04-02

References 2

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

Remediation

  • github.com https://github.com/openedx/openedx-platform/commit/76462f1e5fa9b37d2621ad7ad19514b403908970
    Patch