CVE-2021-44686 | calibre up to 5.31.x preprocess.py html_preprocess_rules incorrect regex (Issue 18 / Nessus ID 257996)
A vulnerability described as critical has been identified in calibre up to 5.31.x. This issue affects the function html_preprocess_rules of the file ebooks/conversion/preprocess.py. Such manipulation leads to incorrect regular expression.
This vulnerability is listed as CVE-2021-44686. The attack must be carried out from within the local network. There is no available exploit.
Upgrading the affected component is recommended.