CVE-2022-3138Public exploitNetwork attack vector

Browser script execution via unsafe viewer controls

Published Sep 8, 2022 · Updated Aug 3, 2024

Cross-site scripting in draw.io before 20.3.0 allows remote attackers to execute script in a viewer user's browser via a crafted URL. The viewer's back and refresh controls use attacker-controlled navigation data without neutralizing script-capable content before placing it in the page. Exploitation requires a user to open the crafted viewer link; the published CNA assessment reports integrity impact but no service interruption.

CVSS severity4.3
Medium
EPSS probability0.65%
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 draw.io before 20.3.0 allows remote attackers to execute script in a viewer user's browser via a crafted URL. The viewer's back and refresh controls use attacker-controlled navigation data without neutralizing script-capable content before placing it in the page. Exploitation requires a user to open the crafted viewer link; the published CNA assessment reports integrity impact but no service interruption.

The record

CVE
CVE-2022-3138
Published
Sep 8, 2022
Updated
Aug 3, 2024
Vendor
draw.io Ltd
Product
draw.io
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <20.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

draw.io Ltd · draw.ioversion=unspecified <20.3.0

Published CVSS scores

4.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
6.1NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution Malicious Link

Public exploit references

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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