Frappe LMS up to 2.45.x client-side enforcement of server-side security

Summaryinfo

A vulnerability marked as problematic has been reported in Frappe LMS up to 2.45.x. The affected element is an unknown function. This manipulation causes client-side enforcement of server-side security. This vulnerability is registered as CVE-2026-39415. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Frappe LMS up to 2.45.x and classified as problematic. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a client-side enforcement of server-side security vulnerability. The CWE definition for the vulnerability is CWE-602. The product is composed of a server that relies on the client to implement a mechanism that is intended to protect the server. As an impact it is known to affect integrity, and availability. The summary by CVE is:

Frappe Learning Management System (LMS) is a learning system that helps users structure their content. Prior to 2.46.0, a vulnerability has been identified in Frappe Learning where quiz scores can be modified by students before submission. The application currently relies on client-side calculated scores, which can be altered using browser developer tools prior to sending the submission request. While this does not allow modification of other users’ data or privilege escalation, it compromises the integrity of quiz results and undermines academic reliability. This issue affects data integrity but does not expose confidential information or allow unauthorized access to other accounts. This vulnerability is fixed in 2.46.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-39415 since 04/07/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2.46.0 eliminates this vulnerability.

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Productinfo

Vendor

• Frappe

Name

• LMS

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.40
• 2.41
• 2.42
• 2.43
• 2.44
• 2.45

Website

• Product: https://github.com/frappe/lms/

CPE 2.3info

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CPE 2.2info

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