CVE-2023-22947

SYSTEM privilege escalation via writable DLL directory

Published Jan 11, 2023 · Updated Apr 7, 2025

Privilege escalation in Shibboleth Service Provider before 3.4.1 allows local users to execute planted DLLs as SYSTEM on Windows. The pre-3.4.1 Windows installer leaves the service executable's installation directory writable, so the SYSTEM service loads attacker-supplied DLLs placed beside it. Exploitation requires local write access to that folder and service execution; the vendor disputes the report's significance and describes the ACLs as best effort.

CVSS severity7.3
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Shibboleth Service Provider before 3.4.1 allows local users to execute planted DLLs as SYSTEM on Windows. The pre-3.4.1 Windows installer leaves the service executable's installation directory writable, so the SYSTEM service loads attacker-supplied DLLs placed beside it. Exploitation requires local write access to that folder and service execution; the vendor disputes the report's significance and describes the ACLs as best effort.

The record

CVE
CVE-2023-22947
Published
Jan 11, 2023
Updated
Apr 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-427, T1574.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.001DLL Search Order Hijacking

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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