CVE-2022-40440Public exploitNetwork attack vector

Script execution via unsanitized tooltip HTML

Published Oct 11, 2022 · Updated Jul 9, 2026

Cross-site scripting in mxGraph 4.2.2 allows remote attackers to execute script in a user's browser through crafted tooltip content. The mxTooltipHandler.show() method assigns a string returned by graph.getTooltip() to a tooltip div's innerHTML without sanitizing it. Exploitation requires enabled tooltips and a user hover over an attacker-controlled graph node, after which the script runs in the embedding page's browser context.

CVSS severity6.1
Medium
EPSS probability0.63%
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 mxGraph 4.2.2 allows remote attackers to execute script in a user's browser through crafted tooltip content. The mxTooltipHandler.show() method assigns a string returned by graph.getTooltip() to a tooltip div's innerHTML without sanitizing it. Exploitation requires enabled tooltips and a user hover over an attacker-controlled graph node, after which the script runs in the embedding page's browser context.

The record

CVE
CVE-2022-40440
Published
Oct 11, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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.

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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 exploitPublished

Weakness, pattern, technique

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

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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