Larry Nguyen discovered a cross site scripting vulnerability in gallery,
a web-based photo album written in php. This security flaw can allow a
malicious user to craft a URL that executes Javascript code on your
website.
For the current stable distribution (woody) this problem has been fixed
in version 1.25-8woody1.
For the unstable distribution (sid) this problem has been fixed in
version 1.3.4-3.
We recommend that you update your gallery package.