Missing Authorization Affecting xblock-lti-consumer package, versions [7.0.0,7.2.2)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.05% (22nd percentile)

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  • Snyk IDSNYK-PYTHON-XBLOCKLTICONSUMER-3250299
  • published27 Jan 2023
  • disclosed27 Jan 2023
  • creditUnknown

Introduced: 27 Jan 2023

CVE-2023-23611  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade xblock-lti-consumer to version 7.2.2 or higher.

Overview

xblock-lti-consumer is a XBlock that implements the consumer side of the LTI specification

Affected versions of this package are vulnerable to Missing Authorization in the publish_grade_on_score_update() function in signals/signals.py that allows any LTI tool that is integrated with the Open edX platform to post a grade back for any LTI XBlock, using the block location for that XBlock. 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, which can be controlled by an unauthorized user.

References

CVSS Scores

version 3.1