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-rw-r--r--doc/security.mdwn7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/security.mdwn b/doc/security.mdwn
index d834aa1a5..d9e0f655b 100644
--- a/doc/security.mdwn
+++ b/doc/security.mdwn
@@ -47,6 +47,13 @@ Users with only web commit access are limited to editing pages as ikiwiki
doesn't support file uploads from browsers (yet), so they can't exploit
this.
+It is possible to embed an image in a page edited over the web, by using
+`img src="data:image/png;"`. Ikiwiki's htmlscrubber only allows `data:`
+urls to be used for `image/*` mime types. It's possible that some broken
+browser might ignore the mime type and if the data provided is not an
+image, instead run it as javascript, or something evil like that. Hopefully
+not many browsers are that broken.
+
## multiple accessors of wiki directory
If multiple people can directly write to the source directory ikiwiki is