CVE-2023-48305Public exploit

LDAP password disclosure via debug argument logging

Published Nov 21, 2023 · Updated Nov 27, 2024

Cleartext credential storage in Nextcloud Server 25.0.0 through 27.0.x allows local users to read LDAP passwords from debug logs. The user_ldap LDAP wrapper serializes every LDAP call's argument array with json_encode and passes it to the debug logger, including ldap_bind's plaintext password argument. Exposure requires the LDAP backend and debug logging; access to the resulting log reveals credentials recorded during bind operations.

CVSS severity4.2
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext credential storage in Nextcloud Server 25.0.0 through 27.0.x allows local users to read LDAP passwords from debug logs. The user_ldap LDAP wrapper serializes every LDAP call's argument array with json_encode and passes it to the debug logger, including ldap_bind's plaintext password argument. Exposure requires the LDAP backend and debug logging; access to the resulting log reveals credentials recorded during bind operations.

The record

CVE
CVE-2023-48305
Published
Nov 21, 2023
Updated
Nov 27, 2024
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-312, T1552.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 25.0.0, < 25.0.11
  2. Affected versionversion=>= 26.0.0, < 26.0.6
  3. Affected versionversion=>= 27.0.0, < 27.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 25.0.0, < 25.0.11; version=>= 26.0.0, < 26.0.6; version=>= 27.0.0, < 27.1.0

Published CVSS scores

4.2GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.4NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1552.001Credentials In Files

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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