GHSA-xfx2-prg5-jq3g INSATutorat has an authorization bypass vulnerability in its /api/admin/* endpoints
Standard users can bypass authorization checks to read sensitive data and modify resources via admin API endpoints.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-xfx2-prg5-jq3g?
GHSA-xfx2-prg5-jq3g is an authentication bypass vulnerability in github.com/romitou/insatutorat, published on 1 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Impact
An authorization bypass vulnerability was discovered in the administration pages of the tutoring application. When a standard user (logged in but without administrator privileges) attempts to access a resource under /api/admin/, the system detects the error but does not block the request.
As a result, sensitive data is still transmitted by the server in the request (GET), and modification actions such as campaign creation (POST) are executed successfully despite the FORBIDDEN error message. All /api/admin/* endpoints are affected.
Remediation
The issue was resolved by adding the missing c.Abort() instruction in the Gin authentication middleware (commit 15ae474). This instruction immediately interrupts the processing chain if the user is not an administrator.
Workarounds
There is no workaround other than applying the fix in the source code.
Resources:
- Link to the fix commit: 15ae474
Credits
INSATutorat thanks the Master 2 SSI 25-26 team at the University of Rouen Normandie for their research work on this project.
- Malak Bekkai
- Matthieu Espada Mora
- Amen Allah Khalf Allah
- Liam Laouenan
- Neila Ould Slimane
- Lucas Thomire
This advisory was translated from French to English by GitHub Copilot.
Which versions are affected by GHSA-xfx2-prg5-jq3g?
3 open source packages ship an affected version, including github.com/romitou/insatutorat.
| Package | Affected | Fixed in |
|---|---|---|
github.com/romitou/insatutorat Go | All versions | 0.0.0-20260226075457-15ae47425aed |
github.com/romitou/insatutorat Go | All versions | 0.0.0-20260226075457-15ae47425aed |
github.com/romitou/insatutorat Go | All versions | 0.0.0-20260226075457-15ae47425aed |
How do I fix GHSA-xfx2-prg5-jq3g?
Upgrade github.com/romitou/insatutorat to 0.0.0-20260226075457-15ae47425aed or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is GHSA-xfx2-prg5-jq3g being exploited?
There is no known exploitation of GHSA-xfx2-prg5-jq3g in the wild and no public exploit code.
Sources
Also known as GO-2026-4581.