CVE-2026-91107NVD

Vulnerability Summary

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.

Severity Level

CRITICAL(9.3)

Published Date

Oct 5, 2026

Last Modified

Oct 6, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.24%Probability

Root Weakness (CWE)

CWE-639: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v4.0 Base Metrics — Score 9.3 (CRITICAL)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredLow

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)High

Availability (Vulnerable System)None

Confidentiality (Subsequent System)High

Integrity (Subsequent System)High

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

OS4ED openSIS-Classic >= 9.3

Patched Versions

Not provided by cveorg for this CVE.

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