CVE-2021-45477Network attack vector

Authenticated data disclosure via insecure object reference

Published Mar 2, 2023 · Updated May 18, 2026

Improper parameter handling in Yordam Library Automation System before 19.2 allows remote authenticated users to read user-supplied data. The published record identifies an insecure direct object reference but does not disclose the affected endpoint, parameter, or failed authorization check. Network access and a low-privileged account are required; the documented impact is data disclosure without modification or service interruption.

CVSS severity6.5
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper parameter handling in Yordam Library Automation System before 19.2 allows remote authenticated users to read user-supplied data. The published record identifies an insecure direct object reference but does not disclose the affected endpoint, parameter, or failed authorization check. Network access and a low-privileged account are required; the documented impact is data disclosure without modification or service interruption.

The record

CVE
CVE-2021-45477
Published
Mar 2, 2023
Updated
May 18, 2026
Vendor
Yordam Information Technology Consulting Education and Electronic Systems Ind. Trade Inc.
Product
Yordam Library Automation System
Classifications
CWE-233, CAPEC-39, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2023CVE publishedPublication date reported by the CVE source.
  2. May 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <19.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Yordam Information Technology Consulting Education and Electronic Systems Ind. Trade Inc. · Yordam Library Automation Systemversion=0 <19.2

Published CVSS scores

6.5TR-CERTCVSS:3.1/AV:N/AC:L/PR:L/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-233Improper Handling of Parameters
CAPEC-39Manipulating Opaque Client-based Data Tokens
T1213Data from Information Repositories

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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