CVE-2021-29156Public exploitNetwork attack vector

Sensitive data disclosure via LDAP filter injection

Published Mar 25, 2021 · Updated Aug 3, 2024

LDAP injection in ForgeRock OpenAM before 13.5.1 allows remote attackers to disclose directory data via the unauthenticated WebFinger endpoint. The endpoint embeds the user-supplied resource parameter into an LDAP filter without escaping special characters, allowing crafted filters to test usernames and extract password hashes, session tokens, or signing keys character by character. No authentication is required, and the demonstrated impact is information disclosure rather than data modification or service interruption.

CVSS severity7.5
High
EPSS probability76.39%
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 ForgeRock OpenAM before 13.5.1 allows remote attackers to disclose directory data via the unauthenticated WebFinger endpoint. The endpoint embeds the user-supplied resource parameter into an LDAP filter without escaping special characters, allowing crafted filters to test usernames and extract password hashes, session tokens, or signing keys character by character. No authentication is required, and the demonstrated impact is information disclosure rather than data modification or service interruption.

The record

CVE
CVE-2021-29156
Published
Mar 25, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

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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