CVE-2026-91107

UNKNOWN 0.0

openSIS Classic 9.3 - Insecure Direct Object Reference (IDOR)

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-639
Vendor	os4ed
Product	opensis-classic
Published	Oct 5, 2026

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Affected Versions

OS4ED / openSIS-Classic

9.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

fluidattacks.com: https://fluidattacks.com/advisories/hearts github.com: https://github.com/OS4ED/openSIS-Classic github.com: https://github.com/OS4ED/openSIS-Classic/commit/24bb530391a67c114cd4fe3dff65da7e070f5ed1

Credits

Daniel Celis