CVE-2024-39848: INTERNET2 Grouper

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Internet2 Grouper before 5.6 allows authentication bypass when LDAP authentication is used in certain ways. This is related to internet2.middleware.grouper.ws.security.WsGrouperLdapAuthentication and the use of the UyY29r password for the M3vwHr account. This also affects "Grouper for Web Services" before 4.13.1.

Affected products

• INTERNET2 Grouper: before 5.6 (fixed in 5.6)

Published 2024-06-29. Last modified 2026-06-17.