HTML::FormHandler versions before 0.410000 for Perl allow cross-site scripting via a submitted value rendered unescaped in an error message.

The wrappers and renderers that emit a form's errors interpolate the error string straight into HTML with no escaping. Two of the library's own messages, nomatch and notallowed, splice the submitted value into that string, and a failing type constraint puts the rejected value into the message it builds, which applyactions hands to adderror.

A field declared with a check regexp, a check list or a type constraint reaches those messages, with no custom validator and no non-default configuration. Errors rendered through an application's own escaping template layer rather than the library's rendering roles are not affected.

A request over the network that submits markup to such a field gets it back live inside the error span, running script in the victim's origin. Re-rendering a rejected value later gives the stored variant.

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.

Apache Ant: Path traversal in ftp and scp tasks allows arbitrary file write