Roundcube mangles non-ASCII characters in HTML links when displaying messages

[svetlozaraleksiev]

When displaying HTML links in e-mail messages Roundcube incorrectly mangles any non-ASCII characters. Specifically, in our case, we have URLs with cyrillic alphabet paths.

For example,
http://www.example.com/somepath/ = works ok
http://www.example.com/някакъвпът/ = is mangled

We've seen this issue on Roundcube 1.3.1 and 1.3.2.

The messages are using UTF8 encoding. We tested this with quoted-printable and base64 encoding, and the issue is the same.

Here's a complete sample message:

Test.txt

[alecpl]

Confirmed. Problem in html::parse_attrib_string().

[alecpl]

Fixed.