CVE-2023-22464

ViewVC is a browser interface for CVS and Subversion version control
repositories. Versions prior to 1.2.3 and 1.1.30 are vulnerable to
cross-site scripting. The impact of this vulnerability is mitigated by the
need for an attacker to have commit privileges to a Subversion repository
exposed by an otherwise trusted ViewVC instance. The attack vector involves
files with unsafe names (names that, when embedded into an HTML stream,
would cause the browser to run unwanted code), which themselves can be
challenging to create. Users should update to at least version 1.2.3 (if
they are using a 1.2.x version of ViewVC) or 1.1.30 (if they are using a
1.1.x version). ViewVC 1.0.x is no longer supported, so users of that
release lineage should implement one of the following workarounds. Users
can edit their ViewVC EZT view templates to manually HTML-escape changed
path “copyfrom paths” during rendering. Locate in your template set’s
revision.ezt file references to those changed paths, and wrap them with
[format "html"] and [end]. For most users, that means that references
to [changes.copy_path] will become [format "html"][changes.copy_path][end]. (This workaround should be reverted after
upgrading to a patched version of ViewVC, else “copyfrom path” names will
be doubly escaped.)