CVE-2019-19791Network attack vector

Unauthenticated endpoint access via duplicated index.fcgi path

Published May 29, 2023 · Updated Jan 14, 2025

Authorization bypass in LemonLDAP::NG before 2.0.7 allows remote attackers to access protected SOAP and REST endpoints via crafted URLs. The default Apache configuration applies its Require rule to a path that can be altered by inserting index.fcgi/index.fcgi, routing a restricted endpoint without the intended access check. Exposure requires affected setup options and an Apache deployment; successful requests reach protected endpoint functionality without authentication.

CVSS severity9.8
Critical
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in LemonLDAP::NG before 2.0.7 allows remote attackers to access protected SOAP and REST endpoints via crafted URLs. The default Apache configuration applies its Require rule to a path that can be altered by inserting index.fcgi/index.fcgi, routing a restricted endpoint without the intended access check. Exposure requires affected setup options and an Apache deployment; successful requests reach protected endpoint functionality without authentication.

The record

CVE
CVE-2019-19791
Published
May 29, 2023
Updated
Jan 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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

T1190Exploit Public-Facing Application

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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