Opnsense · Opnsense · CVE-2021-42770
**Name of the Vulnerable Software and Affected Versions**
OPNsense versions prior to 21.7.4
**Description**
A Cross-site scripting (XSS) vulnerability was discovered in OPNsense via the LDAP attribute return in the authentication tester. This issue allows for potential exploitation through the `LDAP attribute` return, which is used in the `authentication tester`.
**Recommendations**
For OPNsense versions prior to 21.7.4, update to version 21.7.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the authentication tester until a patch is applied.