A vulnerability was found in markdown-it up to 2.x. It has been classified as problematic. Affected is an unknown function of the file lib/common/html_re.js. The manipulation leads to inefficient regular expression complexity. Using CWE to declare the problem leads to CWE-1333. The weakness was disclosed 12/27/2022 as 89c8620157d6e38f9872811620d25138fc9d1b0d. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2015-10005. Access to the local network is required for this attack to succeed. Technical details are available. There is no exploit available. The current price for an exploit might be approx. USD $0-$5k at the moment. The MITRE ATT&CK project declares the attack technique as T1449.003. It is declared as not defined. As 0-day the estimated underground price was around $0-$5k. Upgrading to version 3.0.0 is able to address this issue. The updated version is ready for download at github.com. The name of the patch is 89c8620157d6e38f9872811620d25138fc9d1b0d. The bugfix is ready for download at github.com. It is recommended to upgrade the affected component. A possible mitigation has been published before and not just after the disclosure of the vulnerability.