diff --git a/pages/copyvios.mako b/pages/copyvios.mako
index 56efa3f..f1517ca 100644
--- a/pages/copyvios.mako
+++ b/pages/copyvios.mako
@@ -4,7 +4,7 @@
 <% query, bot, all_langs, all_projects, page, result = main(environ) %>
             % if query.project and query.lang and query.title and not page:
                 <div class="red-box">
-                    <p>The given site (project=<b><tt>${query.project}</tt></b>, language=<b><tt>${query.lang}</tt></b>) doesn't seem to exist. It may also be closed or private. <a href="//${query.lang}.${query.project}.org/">Confirm its URL.</a></p>
+                    <p>The given site (project=<b><tt>${query.project | h}</tt></b>, language=<b><tt>${query.lang | h}</tt></b>) doesn't seem to exist. It may also be closed or private. <a href="//${query.lang | h}.${query.project | h}.org/">Confirm its URL.</a></p>
                 </div>
             % elif query.project and query.lang and query.title and page and not result:
                 <div class="red-box">
@@ -23,9 +23,9 @@
                                 <% selected_lang = query.orig_lang if query.orig_lang else cookies["EarwigDefaultLang"].value if "EarwigDefaultLang" in cookies else bot.wiki.get_site().lang %>
                                 % for code, name in all_langs:
                                     % if code == selected_lang:
-                                        <option value="${code}" selected="selected">${name}</option>
+                                        <option value="${code | h}" selected="selected">${name}</option>
                                     % else:
-                                        <option value="${code}">${name}</option>
+                                        <option value="${code | h}">${name}</option>
                                     % endif
                                 % endfor
                             </select>
@@ -34,9 +34,9 @@
                                 <% selected_project = query.project if query.project else cookies["EarwigDefaultProject"].value if "EarwigDefaultProject" in cookies else bot.wiki.get_site().project %>
                                 % for code, name in all_projects:
                                     % if code == selected_project:
-                                        <option value="${code}" selected="selected">${name}</option>
+                                        <option value="${code | h}" selected="selected">${name}</option>
                                     % else:
-                                        <option value="${code}">${name}</option>
+                                        <option value="${code | h}">${name}</option>
                                     % endif
                                 % endfor
                             </select>
@@ -80,16 +80,16 @@
                 <div class="divider"></div>
                 <div id="cv-result-${'yes' if result.violation else 'no'}">
                     % if result.violation:
-                        <h2 id="cv-result-header"><a href="${page.url}">${page.title | h}</a> is a suspected violation of <a href="${result.url | h}">${result.url | urlstrip}</a>.</h2>
+                        <h2 id="cv-result-header"><a href="${page.url}">${page.title | h}</a> is a suspected violation of <a href="${result.url | h}">${result.url | urlstrip, h}</a>.</h2>
                     % else:
-                        <h2 id="cv-result-header">No violations detected in <a href="${page.url()}">${page.title | h}</a>.</h2>
+                        <h2 id="cv-result-header">No violations detected in <a href="${page.url}">${page.title | h}</a>.</h2>
                     % endif
                     <ul id="cv-result-list">
                         <li><b><tt>${round(result.confidence * 100, 1)}%</tt></b> confidence of a violation.</li>
                         % if result.cached:
                             <li>Results are <a id="cv-cached" href="#">cached
                                 <span>To save time (and money), this tool will retain the results of checks for up to 72 hours. This includes the URL of the "violated" source, but neither its content nor the content of the article. Future checks on the same page (assuming it remains unchanged) will not involve additional search queries, but a fresh comparison against the source URL will be made. If the page is modified, a new check will be run.</span>
-                            </a> from ${result.cache_time} (${result.cache_age} ago). <a href="${environ['REQUEST_URI'].decode("utf8") | h}&amp;nocache=1">Bypass the cache.</a></li>
+                            </a> from ${result.cache_time} (${result.cache_age} ago). <a href="${environ['REQUEST_URI'] | h}&amp;nocache=1">Bypass the cache.</a></li>
                         % else:
                             <li>Results generated in <tt>${round(result.tdiff, 3)}</tt> seconds using <tt>${result.queries}</tt> queries.</li>
                         % endif
diff --git a/pages/settings.mako b/pages/settings.mako
index 3eb68ac..4542e78 100644
--- a/pages/settings.mako
+++ b/pages/settings.mako
@@ -20,9 +20,9 @@
                                 <% selected_lang = cookies["EarwigDefaultLang"].value if "EarwigDefaultLang" in cookies else bot.wiki.get_site().lang %>
                                 % for code, name in langs:
                                     % if code == selected_lang:
-                                        <option value="${code}" selected="selected">${name}</option>
+                                        <option value="${code | h}" selected="selected">${name}</option>
                                     % else:
-                                        <option value="${code}">${name}</option>
+                                        <option value="${code | h}">${name}</option>
                                     % endif
                                 % endfor
                             </select>
@@ -31,9 +31,9 @@
                                 <% selected_project = cookies["EarwigDefaultProject"].value if "EarwigDefaultProject" in cookies else bot.wiki.get_site().project %>
                                 % for code, name in projects:
                                     % if code == selected_project:
-                                        <option value="${code}" selected="selected">${name}</option>
+                                        <option value="${code | h}" selected="selected">${name}</option>
                                     % else:
-                                        <option value="${code}">${name}</option>
+                                        <option value="${code | h}">${name}</option>
                                     % endif
                                 % endfor
                             </select>
diff --git a/toolserver/cookies.py b/toolserver/cookies.py
index 2a84c2a..1a86cc7 100644
--- a/toolserver/cookies.py
+++ b/toolserver/cookies.py
@@ -12,7 +12,7 @@ class _CookieManager(SimpleCookie):
         self._path = path.split(environ["PATH_INFO"])[0]
         try:
             super(_CookieManager, self).__init__(environ["HTTP_COOKIE"])
-        except (CookieError, AttributeError):
+        except (CookieError, KeyError):
             super(_CookieManager, self).__init__()
         for cookie in self.keys():
             if self[cookie].value is False:
diff --git a/toolserver/copyvios/highlighter.py b/toolserver/copyvios/highlighter.py
index 0c0b17e..00a4d69 100644
--- a/toolserver/copyvios/highlighter.py
+++ b/toolserver/copyvios/highlighter.py
@@ -2,6 +2,8 @@
 
 from re import sub, UNICODE
 
+# TODO: escape if input contains pseudo-HTML
+
 def highlight_delta(context, chain, delta):
     processed = []
     prev_prev = prev = chain.START