CVE-2025-66296
High
Description
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a privilege escalation vulnerability exists in Grav’s Admin plugin due to the absence of username uniqueness validation when creating users. A user with the create user permission can create a new account using the same username as an existing administrator account, set a new password/email, and then log in as that administrator. This effectively allows privilege escalation from limited user-manager permissions to full administrator access. This vulnerability is fixed in 1.8.0-beta.27.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Grav
PublishedDec 1, 2025
First seenDec 1, 2025
Weakness typeCWE-266CWE-266
How to fix
Update
- getgrav grav1.8.0 or later
- getgrav/grav1.8.0-beta.27 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| getgrav grav | 1.7.49.5 ≤ v < 1.8.0, 1.8.0 | 1.8.0 |
| getgrav/gravPackagist | v < 1.8.0-beta.27 | 1.8.0-beta.27 |
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