CVE-2018-7663
Description
An issue was discovered in resources/views/layouts/app.blade.php in Voten.co before 2017-08-25. An unescaped template literal in the bio field of a user profile (resources/views/layouts/app.blade.php) allows for server-side template injection of arbitrary JavaScript.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
Root cause
"An unescaped template literal in the user's bio field allows for server-side template injection."
Attack vector
An attacker can inject arbitrary JavaScript into the bio field of a user profile. This script is then rendered unescaped within a template literal in the `app.blade.php` file, leading to server-side template injection. The vulnerability is triggered when the user's profile is displayed, causing the injected script to execute on the server.
Affected code
The vulnerability exists in the `resources/views/layouts/app.blade.php` file. Specifically, the line `bio: `{!! Auth::user()->bio !!}`,` is modified to `bio: '{!! strToHex(Auth::user()->bio) !!}',` in the patch.
What the fix does
The patch modifies the `app.blade.php` file by introducing a new helper function `strToHex`. This function converts the user's bio string to its hexadecimal representation, with each byte prefixed by '\x'. This ensures that any special characters or script tags within the bio are treated as literal hexadecimal values rather than executable code when rendered in the template literal, thus preventing template injection.
Preconditions
- inputThe attacker must be able to control the content of the user's bio field.
Generated on Jun 2, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
2- github.com/spencerdodd/public-writeups/blob/master/CVE-2018-7663/README.mdmitrex_refsource_MISC
- github.com/voten-co/voten/commit/ee6a322568166e28465da075159a6d4adbf74d53mitrex_refsource_MISC
News mentions
0No linked articles in our index yet.