CVE-2023-23611CWE-862

xblock-lti-consumer contain Missing Authorization in Grade Pass Back Implementation

Medium · published January 25, 2023

CVSS v3.1
5.4
EPSS
0%
Percentile
31.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00384 · 31.2th percentile
Weakness
CWE-862 · Missing Authorization
Published
2023-01-25T05:39Z
EPSS history
Timeline
  • 25 JAN 05:39Z
    xblock-lti-consumer contain Missing Authorization in Grade Pass Back Implementation
    cvelistv5