Exceptions displayed in non-debug configurations in Symfony

Vulnerability Description

In Symfony before versions 5.0.5 and 4.4.5, some properties of the Exception were not properly escaped when the `ErrorHandler` rendered it stacktrace. In addition, the stacktrace were displayed even in a non-debug configuration. The ErrorHandler now escape alls properties of the exception, and the stacktrace is only display in debug configuration. This issue is patched in symfony/http-foundation versions 4.4.5 and 5.0.5

References

• https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2
• https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db
• https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad