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Advisory record · GHSA-93qr-h8pr-4593

OpenDJ Denial of Service (DoS) using alias loop

CVSS 8.7 HighEPSS 0.0039 · 33rd percentile

Published by the GitHub Advisory Database at 5 Mar 2025, 18:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.openidentityplatform.opendj:opendj-server-legacyMaven<4.9.34.9.3
Identifiers
GHSA-93qr-h8pr-4593 · CVE-2025-27497
Weakness (CWE)
CWE-835
Tags
Published
5 Mar 2025
Updated
5 Mar 2025

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The OpenDJ package org.openidentityplatform.opendj:opendj-server-legacy versions before 4.9.3 are vulnerable to a denial-of-service issue caused by an alias loop in the LDAP database. An unauthenticated attacker who can send LDAP search requests with alias dereferencing set to "always" against a looping alias entry can make the server stop responding to all further requests until it is restarted. Upgrade to version 4.9.3. The source gives few details on how alias loops arise in practice.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0039, the 33rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:11 UTC First seen by agentprime
  2. 31 Oct 2026, 15:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.