CVE-2023-0992Network attack vector

Administrator-session script execution via unescaped User-Agent

Published Jun 9, 2023 · Updated Apr 8, 2026

Stored XSS in Shield Security 17.0.17 and earlier allows remote attackers to run scripts in an administrator's browser via User-Agent. The audit log stores client metadata and renders the User-Agent value without output escaping when an administrator opens an event's Meta view. An unauthenticated request must first generate a logged event, and the payload runs only when an administrator views its metadata, enabling actions in that session.

CVSS severity7.2
High
EPSS probability93.05%
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 Shield Security 17.0.17 and earlier allows remote attackers to run scripts in an administrator's browser via User-Agent. The audit log stores client metadata and renders the User-Agent value without output escaping when an administrator opens an event's Meta view. An unauthenticated request must first generate a logged event, and the payload runs only when an administrator views its metadata, enabling actions in that session.

The record

CVE
CVE-2023-0992
Published
Jun 9, 2023
Updated
Apr 8, 2026
Vendor
Shield Security
Product
Shield Security
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <17.0.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shield Security · Shield Securityversion=0 <17.0.18

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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