CVE-2023-29345Network attack vector

Sandbox escape via crafted-URL cross-site scripting

Published Jun 7, 2023 · Updated Jan 1, 2025

Cross-site scripting in Microsoft Edge (Chromium-based) before 114.0.1823.37 allows remote attackers to escape the browser sandbox. The browser fails to neutralize attacker-controlled script content reached through a specially crafted URL, allowing the script to read sensitive data or alter DOM execution. Exploitation requires the target to click the URL; no availability impact or narrower affected component is publicly documented.

CVSS severity6.1
Medium
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Microsoft Edge (Chromium-based) before 114.0.1823.37 allows remote attackers to escape the browser sandbox. The browser fails to neutralize attacker-controlled script content reached through a specially crafted URL, allowing the script to read sensitive data or alter DOM execution. Exploitation requires the target to click the URL; no availability impact or narrower affected component is publicly documented.

The record

CVE
CVE-2023-29345
Published
Jun 7, 2023
Updated
Jan 1, 2025
Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 1, 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?

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

  1. Affected versionversion=1.0.0 <114.0.1823.37

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Edge (Chromium-based)version=1.0.0 <114.0.1823.37

Published CVSS scores

6.1Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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