CVE-2026-55421: CWE-918: Server-Side Request Forgery (SSRF) in openedx openedx-platform
Description
Open edX Platform enables the authoring and delivery of online learning at any scale. Prior to commit 00b7c3c, the endpoint accepts user-supplied files[].url, performs a server-side fetch using "requests.get(url, allow_redirects=True)". The fetched bytes are then returned inside a ZIP response. This enables SSRF with response exfiltration. Redirect-following is enabled, and there is no timeout in the vulnerable fetch path. This issue has been patched via commit 00b7c3c.
CVSS v3.1
Score 6.8medium
Affected software
openedx
openedx-platform
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Open edX Platform had an SSRF vulnerability (CWE-918) where the endpoint accepted user-supplied URLs in files[].url and performed server-side HTTP GET requests with redirect following enabled and no timeout. The fetched data was included in a ZIP response, allowing attackers to induce the server to make arbitrary HTTP requests and exfiltrate responses. The vulnerability was addressed by a patch in commit 00b7c3c.
Potential Impact
An attacker with high privileges could exploit this SSRF vulnerability to make the server perform arbitrary HTTP requests, potentially accessing internal resources or services. The vulnerability allows response exfiltration, which could lead to disclosure of sensitive information. The CVSS score of 6.8 reflects a medium severity with high confidentiality impact but no integrity or availability impact.
Mitigation Recommendations
This vulnerability has been patched in commit 00b7c3c. Users should update their Open edX Platform installations to include this commit or later versions containing the fix. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T21:48:43.125Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9857eeacd9273b497f3cac
Added to database: 09/02/2026, 17:07:58 UTC
Last enriched: 09/07/2026, 12:33:46 UTC
Last updated: 10/17/2026, 18:48:20 UTC
Views: 79
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