Overview

A vulnerability, which was classified as problematic, has been found in w3c Unicorn. This issue affects the function ValidatorNuMessage of the file src/org/w3c/unicorn/response/impl/ValidatorNuMessage.java. The manipulation of the argument message leads to cross site scripting. The CWE definition for the vulnerability is CWE-79. The weakness was shared 12/29/2022 as 212. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2021-4296. The attack may be initiated remotely. Technical details are available. There is no exploit available. The pricing for an exploit might be around USD $0-$5k at the moment. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. It is declared as not defined. We expect the 0-day to have been worth approximately $0-$5k. The patch is named 51f75c31f7fc33859a9a571311c67ae4e95d9c68. The bugfix is ready for download at github.com. It is recommended to apply a patch to fix this issue. A possible mitigation has been published before and not just after the disclosure of the vulnerability. [Details]

IOB - Indicator of Behavior (787)

IOC - Indicator of Compromise (13)

These indicators of compromise highlight associated network ranges which are known to be part of research and attack activities.

TTP - Tactics, Techniques, Procedures (1)

Tactics, techniques, and procedures summarize the suspected MITRE ATT&CK techniques used. This data is unique as it uses our predictive model for actor profiling.

IOA - Indicator of Attack (2)

These indicators of attack list the potential fragments used for technical activities like reconnaissance, exploitation, privilege escalation, and exfiltration. This data is unique as it uses our predictive model for actor profiling.