CVE-2021-41232Network attack vector

LDAP query manipulation via unescaped username

Published Nov 2, 2021 · Updated Aug 4, 2024

LDAP injection in Steven Weathers Thunderdome before 1.16.3 allows remote attackers to alter LDAP searches via a crafted username. In auth.go, authAndCreateUserLdap inserts UserName into the configured LDAP filter with fmt.Sprintf without escaping LDAP filter metacharacters. LDAP authentication must be enabled; the injected value changes which directory entry the login search returns before credential verification.

CVSS severity8.1
High
EPSS probability1.52%
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 Steven Weathers Thunderdome before 1.16.3 allows remote attackers to alter LDAP searches via a crafted username. In auth.go, authAndCreateUserLdap inserts UserName into the configured LDAP filter with fmt.Sprintf without escaping LDAP filter metacharacters. LDAP authentication must be enabled; the injected value changes which directory entry the login search returns before credential verification.

The record

CVE
CVE-2021-41232
Published
Nov 2, 2021
Updated
Aug 4, 2024
Vendor
Steven Weathers
Product
Thunderdome
Classifications
CWE-90, CWE-74
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=< 2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Steven Weathers · Thunderdomeversion=< 2.0.0

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Public exploit references

No public exploit references are available in this record.

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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