CVE-2021-32651Public exploitNetwork attack vector

LDAP attribute disclosure via unescaped username filter

Published Jun 1, 2021 · Updated Aug 3, 2024

LDAP injection in OneDev 4.4.1 and earlier allows remote authenticated users to infer LDAP directory attributes through login queries. The LdapAuthenticator.authenticate method inserts the submitted username into the configured User Search Filter and passes it to ctx.search after escaping only backslashes. LDAP external authentication must be enabled, and the usable payload depends on that filter; differentiated login errors expose matching attribute values.

CVSS severity3.1
Low
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP injection in OneDev 4.4.1 and earlier allows remote authenticated users to infer LDAP directory attributes through login queries. The LdapAuthenticator.authenticate method inserts the submitted username into the configured User Search Filter and passes it to ctx.search after escaping only backslashes. LDAP external authentication must be enabled, and the usable payload depends on that filter; differentiated login errors expose matching attribute values.

The record

CVE
CVE-2021-32651
Published
Jun 1, 2021
Updated
Aug 3, 2024
Vendor
OneDev Pty
Product
OneDev
Classifications
CWE-90, T1087.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=<= 4.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OneDev Pty · OneDevversion=<= 4.4.1

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
3.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
T1087.002Domain Account

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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