PT-2026-84818 · Unknown · Open Edx Lms
CVE-2026-53636
·
Published
2026-05-11
·
Updated
2026-09-02
CVSS v2.0
7.1
High
| Vector | AV:N/AC:H/Au:N/C:C/I:C/A:N |
Name of the Vulnerable Software and Affected Versions
Open edX LMS versions prior to commit 3a5ac85
Description
The LTI (Learning Tools Interoperability) Provider implementation contains a flaw where the
validate timestamp and nonce() function in lms/djangoapps/lti provider/signature validator.py fails to validate OAuth nonces or timestamps. This allows an attacker to capture a valid LTI launch request and replay it indefinitely without detection.Recommendations
Update to the version containing commit 3a5ac85.
Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Open Edx Lms