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TI-2026-68036 Aliases CVE-2026-91107GHSA-r588-8qfc-26mv

IDOR in openSIS Classic lets teachers reset staff passwords

Priority MEDIUM 42CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

OS4ED openSIS Classic from 9.3 contains an authorization bypass through a user-controlled key (CWE-639). An authenticated user with the built-in teacher role can select any staff record through the staff_id parameter. The School Information update path then resets the password of the selected account.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00238 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OS4EDopenSIS-Classic9.3—No fix listedCNA
  • openSIS-Classic VendorOS4ED Affected 9.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for openSIS-Classic.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-91107
  2. 2026-10-06 Alias added: GHSA-r588-8qfc-26mv
  3. 2026-10-06 CISA SSVC decision points changed
  4. 2026-10-06 Priority changed: MEDIUM → LOW
  5. 2026-10-07 Priority changed: LOW → MEDIUM

References

Patch 1

Advisory 1

Other 1

  • TI-2024-34282 SQL injection vulnerability exists in OS4ED openSIS-Classic Version 9.1, specifically in… CVSS 3.1CRITICAL 9.8
  • TI-2020-10493 openSIS through 7.4 allows SQL Injection. CVSS 3.1CRITICAL 9.8
  • TI-2025-16780 OS4ED openSIS v7.0 through v9.1 contains a SQL injection vulnerability via the stu_id… CVSS 3.1HIGH 8.8
  • TI-2025-16779 An issue in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory… CVSS 3.1HIGH 8.8
  • TI-2024-31069 OS4ED openSIS-Classic v9.1 was discovered to contain a SQL injection vulnerability via a crafted payload. CVSS 3.1HIGH 8.8
  • TI-2024-23488 SQL injection vulnerabilities were discovered in Ajax.php, ForWindow.php, ForExport.php… CVSS 3.1HIGH 8.8
See all 87 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences