Impact

There is a potential for an XSS vulnerability in ESAPI caused by a incorrect regular expression for "onsiteURL" in the antisamy-esapi.xml configuration file that can cause URLs with the "javascript:" scheme to NOT be sanitized. See the reference below for full details.

Patches

Patched in ESAPI 2.3.0.0 and later. See important remediation details in the reference given below.

Workarounds

Manually edit your antisamy-esapi.xml configuration files to change the "onsiteURL" regular expression as per remediation instructions in the reference below.

References

Security Bulletin 8

For more information

If you have any questions or comments about this advisory:

• Email one of the project co-leaders. See email addresses listed on the OWASP ESAPI wiki page, under "Leaders".
• Send email to one of the two ESAPI related Google Groups listed under Where to Find More Information on ESAPI on our README.md page.