CVE-2026-24773

HighPublic PoC

Published: 03 February 2026

Published

03 February 2026

Modified

10 February 2026

KEV Added

—

Patch

—

CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score 0.0009 26.2th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-24773 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Gunet Open Eclass Platform. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 26.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions

addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement

addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1005 Data from Local System Collection

Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.

attack.mitre.org →

Why these techniques?

IDOR in public-facing web app enables remote unauthenticated file access (T1190 initial access via public app exploitation + T1005 collection of data/files from the system).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, an Insecure Direct Object Reference (IDOR) vulnerability allows unauthenticated remote attackers to access personal files of other users by directly requesting…

predictable user identifiers. This issue has been patched in version 4.2.

Deeper analysisAI

CVE-2026-24773 is an Insecure Direct Object Reference (IDOR) vulnerability, classified under CWE-639, affecting the Open eClass platform, a complete course management system formerly known as GUnet eClass. Versions prior to 4.2 are vulnerable, enabling unauthenticated remote attackers to access personal files belonging to other users by directly requesting predictable user identifiers. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating high confidentiality impact with no effects on integrity or availability.

Unauthenticated attackers can exploit this vulnerability over the network with low complexity and no user interaction required. By leveraging predictable user identifiers, they can directly access sensitive personal files of other users, potentially exposing private data without needing privileges or authentication.

The issue has been addressed in Open eClass version 4.2. Additional details are available in the GitHub security advisory at https://github.com/gunet/openeclass/security/advisories/GHSA-63pm-pff4-xc9c.