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CVE-2026-24774— Open eClass Business Logic Flaw Allows Students to Mark Attendance in Expired Activities

Quick assessment

Affected
gunet openeclass
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open eClass是Greek Universities Network开源的一个电子课堂系统。 Open eClass 4.2之前版本存在安全漏洞，该漏洞源于业务逻辑漏洞，可能导致已认证学生通过直接访问特制URL不当标记自己为出勤活动出席。

CVSS 4.3 · Medium EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-24774

Vulnerability Information
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Vulnerability Title
Open eClass Business Logic Flaw Allows Students to Mark Attendance in Expired Activities
Source: CVE Program / CVE List V5
Vulnerability Description
The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, a business logic vulnerability allows authenticated students to improperly mark themselves as present in attendance activities, including activities that have already expired, by directly accessing a crafted URL. This issue has been patched in version 4.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
行为工作流的不恰当实施
Source: CVE Program / CVE List V5
Vulnerability Title
Open eClass 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open eClass是Greek Universities Network开源的一个电子课堂系统。 Open eClass 4.2之前版本存在安全漏洞，该漏洞源于业务逻辑漏洞，可能导致已认证学生通过直接访问特制URL不当标记自己为出勤活动出席。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gunet openeclass < 4.2 -

II. Public POCs for CVE-2026-24774

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III. Intelligence Information for CVE-2026-24774

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Vendor Advisories for CVE-2026-24774 (1)

Same Patch Batch · gunet · 2026-02-03 · 13 CVEs total

CVE-2026-24665 8.7 HIGH Open eClass is Vulnerable to Stored Cross-Site Scripting (XSS) via Student Assignment Uplo
CVE-2026-24669 7.8 HIGH Open eClass Insecure Password Reset Token Reuse Enables Account Takeover
CVE-2026-24773 7.5 HIGH Open eClass Unauthenticated IDOR Allows Access to Arbitrary User Files
CVE-2026-24672 7.3 HIGH Open eClass is Vulnerable to Stored Cross-Site Scripting (XSS) in User Profile Fields
CVE-2026-24666 6.5 MEDIUM Open eClass is Vulnerable to CSRF in Teacher-Restricted Endpoints Allows Unauthorized Acti
CVE-2026-24668 6.5 MEDIUM Open eClass Broken Access Control Allows Students to Add Content to Course Units
CVE-2026-24670 6.5 MEDIUM Open eClass Has Broken Access Control in Course Units Module Allows Students to Create Uni
CVE-2026-24671 6.1 MEDIUM Open eClass is Vulnerable to Stored Cross-Site Scripting (XSS) in Multiple High-Privilege
CVE-2026-24664 5.3 MEDIUM Open eClass is Vulnerable to Username Enumeration via Login Response Discrepancies
CVE-2026-24667 5.0 MEDIUM Open eClass's Active Sessions Not Invalidated After Password Change Allow Persistent Accou
CVE-2026-24674 4.7 MEDIUM Open eClass is Vulnerable to Reflected Cross-Site Scripting (XSS) in Multiple Endpoints
CVE-2026-24673 4.3 MEDIUM Open eClass Has File Upload Filter Bypass via ZIP Archive Extraction

IV. Related Vulnerabilities

Same product: openeclass
Same vendor: gunet
Same weakness: CWE-841

V. Comments for CVE-2026-24774

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