CVE-2021-3825Public exploitNetwork attack vector

LDAP credential disclosure via unauthenticated configuration endpoint

Published Oct 1, 2021 · Updated May 18, 2026

Information disclosure in the Lider module of TÜBİTAK BİLGEM Liderahenk before 2.1.16 allows remote attackers to obtain LDAP credentials via HTTP. Spring Security permits all requests to /lider/config/**, and ConfigController returns stored configuration through GET /lider/config/configurations without a session. Network access to the Lider HTTP service is sufficient; the response exposes reusable LDAP and XMPP credentials, enabling administrative console access and downstream task execution.

CVSS severity9.6
Critical
EPSS probability1.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Lider module of TÜBİTAK BİLGEM Liderahenk before 2.1.16 allows remote attackers to obtain LDAP credentials via HTTP. Spring Security permits all requests to /lider/config/**, and ConfigController returns stored configuration through GET /lider/config/configurations without a session. Network access to the Lider HTTP service is sufficient; the response exposes reusable LDAP and XMPP credentials, enabling administrative console access and downstream task execution.

The record

CVE
CVE-2021-3825
Published
Oct 1, 2021
Updated
May 18, 2026
Vendor
TÜBİTAK BİLGEM
Product
Liderahenk
Classifications
CWE-306, CAPEC-136, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 1, 2021CVE publishedPublication date reported by the CVE source.
  2. May 18, 2026Record 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=unspecified <2.1.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TÜBİTAK BİLGEM · Liderahenkversion=unspecified <2.1.16

Published CVSS scores

9.6Computer Emergency Response Team of the Republic of TurkeyCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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 exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-136LDAP Injection
T1552Unsecured Credentials

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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