CVE-2026-88065: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in NIAEFEUP tts-be
`tts-be` is a backend for a timetable selector that aims to help students better choose their class schedules. Versions prior to 2.1.0 have a Broken Access Control vulnerability across several API endpoints (such as `/api/student/{id}/photo` and `/api/course_unit/{id}/exchange/metadata`). By chaining these unauthenticated endpoints, a remote attacker can use the backend as an open proxy to bypass authorization checks, allowing for the enumeration and extraction of sensitive Personally Identifiable Information (PII) from upstream university systems. The exposed data includes full names, student IDs, class schedules, and photos. This issue was fixed in version 2.1.0.
AI Analysis
Technical Summary
The tts-be backend for a timetable selector has a Broken Access Control vulnerability (CWE-200, CWE-306, CWE-639) affecting versions before 2.1.0. Several unauthenticated API endpoints such as /api/student/{id}/photo and /api/course_unit/{id}/exchange/metadata can be chained by a remote attacker to bypass authorization and use the backend as an open proxy. This allows unauthorized access to sensitive PII data from university systems. The vulnerability is addressed in version 2.1.0.
Potential Impact
An attacker can remotely access sensitive personal information including full names, student IDs, class schedules, and photos without authentication or authorization. This exposure of PII can lead to privacy violations and potential misuse of student data. The vulnerability does not impact integrity or availability but results in a high confidentiality impact.
Mitigation Recommendations
Upgrade tts-be to version 2.1.0 or later, where this Broken Access Control vulnerability is fixed. No other mitigation is indicated or required according to the vendor advisory.
CVE-2026-88065: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in NIAEFEUP tts-be
Description
`tts-be` is a backend for a timetable selector that aims to help students better choose their class schedules. Versions prior to 2.1.0 have a Broken Access Control vulnerability across several API endpoints (such as `/api/student/{id}/photo` and `/api/course_unit/{id}/exchange/metadata`). By chaining these unauthenticated endpoints, a remote attacker can use the backend as an open proxy to bypass authorization checks, allowing for the enumeration and extraction of sensitive Personally Identifiable Information (PII) from upstream university systems. The exposed data includes full names, student IDs, class schedules, and photos. This issue was fixed in version 2.1.0.
CVSS v3.1
Score 7.5high
Affected software
NIAEFEUP
tts-be
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The tts-be backend for a timetable selector has a Broken Access Control vulnerability (CWE-200, CWE-306, CWE-639) affecting versions before 2.1.0. Several unauthenticated API endpoints such as /api/student/{id}/photo and /api/course_unit/{id}/exchange/metadata can be chained by a remote attacker to bypass authorization and use the backend as an open proxy. This allows unauthorized access to sensitive PII data from university systems. The vulnerability is addressed in version 2.1.0.
Potential Impact
An attacker can remotely access sensitive personal information including full names, student IDs, class schedules, and photos without authentication or authorization. This exposure of PII can lead to privacy violations and potential misuse of student data. The vulnerability does not impact integrity or availability but results in a high confidentiality impact.
Mitigation Recommendations
Upgrade tts-be to version 2.1.0 or later, where this Broken Access Control vulnerability is fixed. No other mitigation is indicated or required according to the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-09-09T21:22:45.435Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa9ab5855bf5e2cf5574485
Added to database: 09/15/2026, 20:32:24 UTC
Last enriched: 09/15/2026, 20:46:26 UTC
Last updated: 09/16/2026, 01:56:10 UTC
Views: 8
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