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

Quick assessment

Affected
openedx openedx-platform
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open edX Platform是Open edX开源的一套开源的课程管理系统（CMS）。该系统可用于MOOCs（大规模网络开放课程）以及较小的课程和培训模块。 Open edX Platform存在输入验证错误漏洞，该漏洞源于view_survey端点未验证redirect_url参数，可能导致开放重定向攻击。

CVSS 4.7 · Medium EPSS 0.26% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
openedx openedx-platform < 76462f1e5fa9b37d2621ad7ad19514b403908970 affected
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I. Basic Information for CVE-2026-35404

Vulnerability Information
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Vulnerability Title
Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Open edX Platform 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open edX Platform是Open edX开源的一套开源的课程管理系统（CMS）。该系统可用于MOOCs（大规模网络开放课程）以及较小的课程和培训模块。 Open edX Platform存在输入验证错误漏洞，该漏洞源于view_survey端点未验证redirect_url参数，可能导致开放重定向攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openedx openedx-platform < 76462f1e5fa9b37d2621ad7ad19514b403908970 -

II. Public POCs for CVE-2026-35404

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III. Intelligence Information for CVE-2026-35404

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Patches & Fixes for CVE-2026-35404 (1)

Vendor Advisories for CVE-2026-35404 (1)

IV. Related Vulnerabilities

Same product: openedx-platform
Same vendor: openedx
Same weakness: CWE-601

V. Comments for CVE-2026-35404

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