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TI-2025-20332 Aliases CVE-2025-27497GHSA-93qr-h8pr-4593

OpenDJ Denial of Service (Dos) using alias loop

Priority HIGH 77CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-835.

Summary

OpenDJ is an LDAPv3 compliant directory service. OpenDJ prior to 4.9.3 contains a denial-of-service (DoS) vulnerability that causes the server to become unresponsive to all LDAP requests without crashing or restarting. This issue occurs when an alias loop exists in the LDAP database. If an ldapsearch request is executed with alias dereferencing set to "always" on this alias entry, the server stops responding to all future requests. Fortunately, the server can be restarted without data corruption. This vulnerability is fixed in 4.9.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00389 33rd percentileScored 2026-11-07
Fix Fixed OpenDJ (OpenIdentityPlatform): 4.9.3org.openidentityplatform.opendj:opendj-server-legacy (Maven): 4.9.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenIdentityPlatformOpenDJbefore 4.9.34.9.3Patch availableCNA
—org.openidentityplatform.opendj:opendj-server-legacy (Maven)before 4.9.34.9.3Patch availableGHSA-93qr-h8pr-4593
  • OpenDJ VendorOpenIdentityPlatform Affected before 4.9.3 Fixed in 4.9.3 Patch available CNA
  • org.openidentityplatform.opendj:opendj-server-legacy (Maven) Vendor— Affected before 4.9.3 Fixed in 4.9.3 Patch available GHSA-93qr-h8pr-4593

Remediation

  • Fix · CNA OpenDJ (OpenIdentityPlatform) Fixed in 4.9.3
  • Fix · GHSA-93qr-h8pr-4593 org.openidentityplatform.opendj:opendj-server-legacy (Maven) Fixed in 4.9.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27497
  2. 2026-10-03 Alias added: GHSA-93qr-h8pr-4593

References

Advisory 1

Other 3

  • TI-2026-25836 Pre-Authentication Remote Code Execution via `jato.clientSession` Deserialization in OpenAM CVSS 4.0CRITICAL 9.3
  • TI-2026-86693 Session token disclosure in OpenAM notification WebSocket CVSS 4.0CRITICAL 10.0
  • TI-2026-86692 Authentication bypass in OpenAM SAML login accepts unsigned assertions CVSS 4.0CRITICAL 9.3
  • TI-2026-86691 Privilege escalation in OpenAM via self-registration attribute bypass CVSS 4.0CRITICAL 9.3
  • TI-2026-86685 Unbounded Java deserialization in OpenAM enables denial of service CVSS 4.0HIGH 8.7
  • TI-2026-44519 OpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCustomCallback CVSS 3.1CRITICAL 9.8
See all 54 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences