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

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Summary

CVECVE-2026-35404
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-06 22:16:21 UTC
Updated2026-04-16 04:41:09 UTC
DescriptionOpen edX Platform enables the authoring and delivery of online learning at any scale. he 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.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.000300000 probability, percentile 0.087260000 (date 2026-04-21)

Problem Types: CWE-601 | CWE-601 CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1[email protected]Secondary4.7MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
3.1CNADECLARED4.7MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openedx Openedx All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Openedx Openedx-platform affected < 76462f1e5fa9b37d2621ad7ad19514b403908970 Not specified

References

ReferenceSourceLinkTags
github.com/openedx/openedx-platform/security/advisories/GHSA-2843-x998-f8r2 [email protected] github.com Exploit, Vendor Advisory
github.com/openedx/openedx-platform/commit/76462f1e5fa9b37d2621ad7ad1951... [email protected] github.com Patch
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