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TI-2026-27540 Aliases CVE-2026-35404

Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter

Priority MEDIUM 60CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00227 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed openedx-platform (openedx): 76462f1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
openedxopenedx-platformbefore 76462f176462f1Patch availableCNA
  • openedx-platform Vendoropenedx Affected before 76462f1 Fixed in 76462f1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openedx:openedx:*:*:*:*:*:*:*:*up to 2026-04-02Vulnerableopenedx
  • cpe:2.3:a:openedx:openedx:*:*:*:*:*:*:*:* Versions up to 2026-04-02 Vulnerable ·openedx

Remediation

  • Fix · CNA openedx-platform (openedx) Fixed in 76462f1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35404

References

Exploit 1

Patch 1

  • TI-2026-31065 Open edX Platform: Server-Side Request Forgery (SSRF) in SAML Provider Data Sync Endpoint CVSS 3.1CRITICAL 9.9
  • TI-2026-31064 Open edX Platform: Stored CSS Injection in Email Notifications via Incomplete HTML Sanitization CVSS 3.1MEDIUM 5.4
  • TI-2024-29377 openedx-translations's Atlas translations for Open edX missing validation CVSS 3.1CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences