CVE-2023-1656Network attack vector

LDAP credential exposure via pre-TLS bind

Published Mar 29, 2023 · Updated Apr 14, 2025

Cleartext LDAP credential transmission in ForgeRock OpenIDM and Java RCS 1.5.20.9 through 1.5.20.13 allows attackers to capture bind credentials. With StartTLS configured, the LDAP Connector sends LDAP BIND credentials before establishing TLS, leaving them readable on the network. Exposure requires visibility into the connector's LDAP connection; stolen credentials grant only the remote-service access assigned to the affected account.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext LDAP credential transmission in ForgeRock OpenIDM and Java RCS 1.5.20.9 through 1.5.20.13 allows attackers to capture bind credentials. With StartTLS configured, the LDAP Connector sends LDAP BIND credentials before establishing TLS, leaving them readable on the network. Exposure requires visibility into the connector's LDAP connection; stolen credentials grant only the remote-service access assigned to the affected account.

The record

CVE
CVE-2023-1656
Published
Mar 29, 2023
Updated
Apr 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-319, CAPEC-555, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 2025Record 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5ForgeRock, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
CAPEC-555Remote Services with Stolen Credentials
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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