Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the `refresh_token` grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoever holds such an access token could keep access beyond the token's original lifetime.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Gitea Gitea
cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*
|
— |
28.1.0
|
References 5
https://blog.gitea.com/release-of-28.1.0/
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https://github.com/go-gitea/gitea/pull/39501
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https://github.com/go-gitea/gitea/pull/39507
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https://github.com/go-gitea/gitea/releases/tag/v28.1.0
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https://github.com/go-gitea/gitea/security/advisories/GHSA-469m-x4mw-38r3
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