CVE-2024-39848Network attack vector

Authentication bypass via empty-password LDAP bind

Published Jun 29, 2024 · Updated Mar 27, 2025

Authentication bypass in Internet2 Grouper before 5.6 allows remote attackers to invoke web services as an existing user without a password. WsGrouperLdapAuthentication treats a successful LDAP bind for a valid username and empty password as authenticated. Exploitation requires LDAP authentication, a directory that accepts unauthenticated binds, and an existing user authorized for web services; successful requests inherit that user's data access.

CVSS severity9.1
Critical
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Internet2 Grouper before 5.6 allows remote attackers to invoke web services as an existing user without a password. WsGrouperLdapAuthentication treats a successful LDAP bind for a valid username and empty password as authenticated. Exploitation requires LDAP authentication, a directory that accepts unauthenticated binds, and an existing user authorized for web services; successful requests inherit that user's data access.

The record

CVE
CVE-2024-39848
Published
Jun 29, 2024
Updated
Mar 27, 2025
Vendor
Internet2
Product
Grouper
Classifications
CWE-1390, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Internet2 · Grouperversion=0 <5.6

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1390Weak Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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