Grav is a file-based Web-platform built in PHP. Grav is subject to a server side template injection (SSTI) vulnerability. The fix for another SSTI vulnerability using |map, |filter and |reduce twigs implemented in the commit 71bbed1 introduces bypass of the denylist due to incorrect return value from isDangerousFunction(), which allows to execute the payload prepending double backslash (). The `isDangerousFunction()` check in version 1.7.42 and onwards retuns `false` value instead of `true` when the symbol is found in the $name. This vulnerability can be exploited if the attacker has access to: 1. an Administrator account, or 2. a non-administrator, user account that has Admin panel access and Create/Update page permissions. A fix for this vulnerability has been introduced in commit b4c6210 and is included in release version 1.7.42.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.
A function or operation returns an incorrect return value or status code that does not indicate an error, but causes the product to modify its behavior based on the incorrect result.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Grav | Getgrav | 1.7.42 (including) | 1.7.42 (including) |
| Grav | Getgrav | 1.7.42.1 (including) | 1.7.42.1 (including) |