Werk #7661: Fixed possible stored XSS using the internal server error handler
| Component | Site management | ||
| Title | Fixed possible stored XSS using the internal server error handler | ||
| Date | Jul 6, 2017 | ||
| Level | Trivial Change | ||
| Class | Security Fix | ||
| Compatibility | Compatible - no manual interaction needed | ||
| Checkmk versions & editions |
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The internal server error handler was displaying unescaped information from the error log of the webserver. When an attacker is able to add HTML code to error messages written to the error log of the web server, the internal server error handler was not escaping the HTML code when displaying it to the user.