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CVE-2026-61805: Frappe LMS: Quiz result manipulation and cross-user submission forgery

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• Public exploit or detection template: none known
• Published: 2026-10-30 · updated 2026-10-30
• Weakness: CWE-862

Description

Frappe Learning Management System (LMS) is a learning system that helps users structure their content. Prior to version 2.54.0, quiz submission records are not adequately authorized on the server. Through a `REST` bypass, an authenticated student can record a passing or perfect quiz result without their answers being verified, unlocking course completion and certificates. The student can also create a submission attributed to another user, exhausting that user's allowed attempts and blocking legitimate submissions. These integrity and availability issues are scoped to quiz results; they do not expose other users' data or grant elevated roles. This issue is fixed in version 2.54.0.

Affected products

• frappe lms: before 2.54.0

References

• https://github.com/frappe/lms/commit/876504f3900512f528b6e4a7bd3a15673eedd386
• https://github.com/frappe/lms/security/advisories/GHSA-4566-2phx-68gh
• https://github.com/frappe/lms/tree/v2.54.0

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