Vulnerability Description
LTI Consumer XBlock implements the consumer side of the LTI specification enabling integration of third-party LTI provider tools. Versions 7.0.0 and above, prior to 7.2.2, are vulnerable to Missing Authorization. Any LTI tool that is integrated with on the Open edX platform can post a grade back for any LTI XBlock so long as it knows or can guess the block location for that XBlock. An LTI tool submits scores to the edX platform for line items. The code that uploads that score to the LMS grade tables determines which XBlock to upload the grades for by reading the resource_link_id field of the associated line item. The LTI tool may submit any value for the resource_link_id field, allowing a malicious LTI tool to submit scores for any LTI XBlock on the platform. The impact is a loss of integrity for LTI XBlock grades. This issue is patched in 7.2.2. No workarounds exist.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openedx | Xblock-Lti-Consumer | >= 7.0.0, < 7.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/openedx/xblock-lti-consumer/security/advisories/GHSA-7j9p-67mThird Party Advisory
- https://github.com/openedx/xblock-lti-consumer/security/advisories/GHSA-7j9p-67mThird Party Advisory
FAQ
What is CVE-2023-23611?
CVE-2023-23611 is a vulnerability with a CVSS score of 5.4 (MEDIUM). LTI Consumer XBlock implements the consumer side of the LTI specification enabling integration of third-party LTI provider tools. Versions 7.0.0 and above, prior to 7.2.2, are vulnerable to Missing Au...
How severe is CVE-2023-23611?
CVE-2023-23611 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-23611?
Check the references section above for vendor advisories and patch information. Affected products include: Openedx Xblock-Lti-Consumer.