CVE-2021-45479Network attack vector

Stored browser script execution via undisclosed input handling

Published Mar 2, 2023 · Updated May 18, 2026

Stored XSS in Yordam Library Automation System before 19.2 allows remote authenticated users to execute script via a stored payload. The CNA and government advisory do not identify the affected input, storage location, page, or code path. Low-privileged access is required to store the payload, and another user must view the affected page; the script then runs in that user's browser context, with no reported service interruption.

CVSS severity5.4
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Yordam Library Automation System before 19.2 allows remote authenticated users to execute script via a stored payload. The CNA and government advisory do not identify the affected input, storage location, page, or code path. Low-privileged access is required to store the payload, and another user must view the affected page; the script then runs in that user's browser context, with no reported service interruption.

The record

CVE
CVE-2021-45479
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-79, CAPEC-592
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

5.4TR-CERTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS

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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