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CVE-2026-91107

openSIS Classic 9.3 - Insecure Direct Object Reference (IDOR)

openSIS Classic 9.3 allows an authenticated user with the built-in teacher role can select an arbitrary staff record through staff_id and cause the School Information update path to reset that selected account's password.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
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CVE-2026-103115

OS4ED openSIS-Classic Student Search CustomFieldsFnc.php sql injection

A security flaw has been discovered in OS4ED openSIS-Classic up to 9.3. This affects an unknown function of the file functions/CustomFieldsFnc.php of the component Student Search. The manipulation of the argument cust results in sql injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
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CVE-2026-103113

OS4ED openSIS-Classic General Information Tab Student.php save action sql injection

A vulnerability was determined in OS4ED openSIS-Classic up to 9.3. The affected element is the function save action of the file modules/students/Student.php of the component General Information Tab. Executing a manipulation of the argument students can lead to sql injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
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CVE-2026-103116

OS4ED openSIS-Classic Student List Search Endpoint GetStuListFnc.php DBQuery sql injection

A weakness has been identified in OS4ED openSIS-Classic up to 9.3. This impacts the function DBQuery of the file functions/GetStuListFnc.php of the component Student List Search Endpoint. This manipulation of the argument LO_sort causes sql injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
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CVE-2026-103117

OS4ED openSIS-Classic Save Data DatabaseInc.php db_properties sql injection

A security vulnerability has been detected in OS4ED openSIS-Classic up to 9.3. Affected is the function db_properties of the file functions/DatabaseInc.php of the component Save Data Handler. Such manipulation of the argument values leads to sql injection. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
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CVE-2026-103114

OS4ED openSIS-Classic Assignment Management Endpoint Assignments.php DBQuery_assignment sql injection

A vulnerability was identified in OS4ED openSIS-Classic up to 9.3. The impacted element is the function DBQuery_assignment of the file modules/grades/Assignments.php of the component Assignment Management Endpoint. The manipulation of the argument Tables leads to sql injection. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
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CVE-2026-11944

openSIS Classic 9.3 - Authenticated path traversal in SentMail attachment download

openSIS Classic 9.3 contains an authenticated path traversal vulnerability in the legacy messaging sent-mail attachment download functionality that allows an authenticated attacker to read arbitrary files on the server via crafted path traversal sequences.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
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CVE-2026-8406

openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail

openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail_id value.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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CVE-2025-65594

OpenSIS 9.2 and below is vulnerable to Incorrect Access Control in Student.php, which allows an authenticated low-privilege user to perform unauthorized database write operations relating to the data of other users.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
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CVE-2025-22923

An issue in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory traversal and delete files by sending a crafted POST request to /Modules.php?modname=users/Staff.php&removefile.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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CVE-2025-22927

An issue in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory traversal by sending a crafted POST request to /Modules.php?modname=messaging/Inbox.php&modfunc=save&filename.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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CVE-2025-22931

An insecure direct object reference (IDOR) in the component /assets/stafffiles of OS4ED openSIS v7.0 to v9.1 allows unauthenticated attackers to access files uploaded by staff members.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2025-26186

SQL Injection vulnerability in openSIS v.9.1 allows a remote attacker to execute arbitrary code via the id parameter in Ajax.php

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
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CVE-2024-46626

OS4ED openSIS-Classic v9.1 was discovered to contain a SQL injection vulnerability via a crafted payload.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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CVE-2024-35584

SQL injection vulnerabilities were discovered in Ajax.php, ForWindow.php, ForExport.php, Modules.php, functions/HackingLogFnc.php in OpenSis Community Edition 9.1 to 8.0, and possibly earlier versions. It is possible for an authenticated user to perform SQL Injection due to the lack to sanitisation. The application takes arbitrary value from "X-Forwarded-For" header and appends it to a SQL INSERT statement directly, leading to SQL Injection.

CVSS 3.1 · 8.8 High EPSS 5.9% KEV · Not listed
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CVE-2024-51211

SQL injection vulnerability exists in OS4ED openSIS-Classic Version 9.1, specifically in the resetuserinfo.php file. The vulnerability is due to improper input validation of the $username_stn_id parameter, which can be manipulated by an attacker to inject arbitrary SQL commands.

CVSS 3.1 · 9.8 Critical EPSS 2.3% KEV · Not listed
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CVE-2021-41691

A SQL injection vulnerability exists in OS4Ed Open Source Information System Community v8.0 via the "student_id" and "TRANSFER{SCHOOL]" parameters in POST request sent to /TransferredOutModal.php.

CVSS 3.1 · 9.8 Critical EPSS 2.1% KEV · Not listed
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CVE-2025-22928

OS4ED openSIS v7.0 to v9.1 was discovered to contain a SQL injection vulnerability via the cp_id parameter at /modules/messages/Inbox.php.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2025-22926

An issue in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory traversal by sending a crafted POST request to /Modules.php?modname=messaging/Inbox.php&modfunc=save&filename.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2025-22929

OS4ED openSIS v7.0 to v9.1 was discovered to contain a SQL injection vulnerability via the filter_id parameter at /students/StudentFilters.php.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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